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AltF Backlinks

Free backlink sites list: 1,964 places to get a link

A maintained list of 1,964 legitimate backlink sites: directories, profile creation sites, guest posting sites, launch platforms, registries and marketplaces. 1,628 are free or have a free tier, 44 usually give a dofollow link, and 781 have an estimated DA of 70 or more. Every row shows authority, link type, cost and effort, and links straight to the submit page.

1,964
Opportunities
1,628
Free or freemium
781
Est. DA 70+
208
Quick wins

1–100 of 239 opportunities

The table is wider than the screen — swipe it sideways for cost, effort and the preparation notes.

Submission opportunities with impact score, cost, effort, priority, status and preparation notes. Scroll horizontally for all columns.
#Impact (sorted)Site — sort by thisEst. DA — sort by thisLinkDomainTypeCostEffort — sort by thisPriorityStatusWhat to prepareRules / caveatCheckedActions
168BibSonomy65Nofollowbibsonomy.orgSocial channelsFreeQuickMediumVerified liveCurate a tagged public collection of authoritative privacy, accessibility, and safety resources with your tool included only where substantively relevant.Build a balanced useful bibliography; avoid repetitive self-bookmarking, keyword stuffing, or treating the service as a backlink directory.Official BibSonomy service and guidance checked 2026-08-07Open BibSonomy submit page (new tab)BibSonomy details
268bio.tools55Link type unknownbio.toolsSoftware directoriesFreeQuickMediumVerified liveRegister a genuinely life-science-focused your tool resource with stable homepage, scientific operations, inputs, outputs, licence, and documentation.Must perform a credible bioinformatics or life-science function; medical branding alone is insufficient and EDAM metadata is expected.2026-08-05 — https://biotools.readthedocs.io/en/latest/quickstart_guide.htmlOpen bio.tools submit page (new tab)bio.tools details
368Budibase Community Plugins60Link type unknownbudibase.comMarketplaces and app storesFreeQuickMediumVerified liveBuild a useful your tool Budibase component or data-source plugin, publish the package or repository, and seek inclusion in community plugin resources.A functional plugin and public package are required; central curation is not guaranteed, so treat the package and documentation as the primary asset.Official Budibase custom plugin documentation checked 2026-08-07Open Budibase Community Plugins submit page (new tab)Budibase Community Plugins details
468CapRover One-Click Apps50Link type unknowncaprover.comSoftware directoriesFreeQuickMediumVerified liveCreate a tested CapRover one-click definition for a real self-hosted your tool service and contribute it to the linked official community repository.The directory is community-maintained; use safe defaults, document required variables and persistence, and keep images and deployment instructions current.Official CapRover one-click app documentation and repository checked 2026-08-05Open CapRover One-Click Apps submit page (new tab)CapRover One-Click Apps details
568Chanakya Software—Link type unknownchanakyasoftware.comSoftware directoriesFreeQuickMediumVerified liveCreate a vendor account and list your tool software offering.Provide genuine vendor, website, software, and service details.https://www.chanakyasoftware.com/list-your-softwareOpen Chanakya Software submit page (new tab)Chanakya Software details
668Clojars60Link type unknownclojars.orgDeveloper registriesFreeQuickMediumVerified liveRelease a genuine Clojure or JVM client library with a POM, description, homepage and source metadata.Requires an account and deploy credentials; use a unique group or verified domain and maintain releases.Official Clojars publishing interface checked 2026-07-30Open Clojars submit page (new tab)Clojars details
768Common Workflow Language55Link type unknowncommonwl.orgSoftware directoriesFreeQuickMediumVerified liveBuild a genuine CWL validator, security tool, or implementation and propose its inclusion with compliance evidence.Must actually support CWL; the community-maintained listing does not constitute formal certification.Official CWL implementation page and website repository checked 2026-08-05Open Common Workflow Language submit page (new tab)Common Workflow Language details
868Commudle40Link type unknowncommudle.comProfiles and entitiesFreeQuickMediumVerified liveCreate a real developer profile, publish an original your tool engineering tutorial or project, and join only relevant privacy or developer communities.Share knowledge first, follow each community's rules, and do not create an empty promotional community or mass-post the same link.Official Commudle community platform checked 2026-08-07Open Commudle submit page (new tab)Commudle details
968Contao Extensions45Link type unknownextensions.contao.orgMarketplaces and app storesFreeQuickMediumVerified liveBuild a functional Contao bundle for an your tool site-audit use case, publish tagged releases on Packagist with contao-bundle and manager-plugin metadata, and let the official index discover it.Requires a real Contao extension, public Composer package, at least one version tag and correct Contao Manager Plugin metadata; optional rich listing metadata is contributed separately.2026-08-05Open Contao Extensions submit page (new tab)Contao Extensions details
1068CPAN / PAUSE80Link type unknowncpan.orgDeveloper registriesFreeQuickMediumVerified livePublish a genuine Perl module or CLI through PAUSE with project URLs and clear distribution documentation.Requires a PAUSE account, unique namespace and ongoing maintenance; first uploader controls the namespace.Official CPAN PAUSE docs checked 2026-07-30Open CPAN / PAUSE submit page (new tab)CPAN / PAUSE details
1168CreativesFeed40Link type unknowncreativesfeed.comSoftware directoriesFreeQuickMediumVerified liveSubmit relevant your tool utilities under AI, web, or developer categories.Only submit tools matching available creative, AI, or development categories.https://creativesfeed.com/contact/submit-your-software/free-software-listing/Open CreativesFeed submit page (new tab)CreativesFeed details
1268devChallenges50Link type unknowndevchallenges.ioDesign galleriesFreeQuickMediumVerified liveBuild a genuine free challenge solution, publish the deployed project and repository, and use the finished privacy or accessibility implementation as a portfolio case study.Only submit work that answers a listed challenge; do not upload AltFTool as an unrelated product, and remember solutions remain public.Official devChallenges platform and plan information checked 2026-08-07Open devChallenges submit page (new tab)devChallenges details
1368Devpost85Nofollowdevpost.comDesign galleriesFreeQuickMediumVerified liveEnter a relevant live hackathon with a working your tool project, complete its story and demo, and include the project website where allowed.Only submit to genuinely relevant events, follow each hackathon's eligibility and judging rules, and do not recycle an unrelated promotion.Official Devpost submission help checked 2026-07-30Open Devpost submit page (new tab)Devpost details
1468ESP Component Registry65Link type unknowncomponents.espressif.comDeveloper registriesFreeQuickMediumVerified liveBuild an ESP-IDF privacy, credential-safety, secure-logging, or local-processing component, add manifest, license, docs, examples, and publish it through the registry workflow.Must be an actual ESP-IDF component; namespace, semantic versioning, linting, licensing, dependency, documentation, and upload rules apply.Official ESP Component Registry publishing documentation checked 2026-08-05Open ESP Component Registry submit page (new tab)ESP Component Registry details
1568F-Droid75Link type unknownf-droid.orgSoftware directoriesFreeQuickMediumVerified livePublish a privacy-respecting open-source Android companion app, then file a packaging request or merge request.App must be source-buildable, useful and actively maintained, with no proprietary tracking, ads or non-free dependencies.Official F-Droid inclusion policy checked 2026-07-30Open F-Droid submit page (new tab)F-Droid details
1668Fluentd Plugin Directory65Link type unknownfluentd.orgMarketplaces and app storesFreeQuickMediumVerified liveBuild and publish a real fluent-plugin-* RubyGem that redacts/routes privacy-sensitive logs and includes your tool as its project homepage.Must follow Fluentd plugin naming/API conventions and be a valid public RubyGem; the official directory refreshes periodically from RubyGems, so indexing is not immediate.2026-08-05 — https://docs.fluentd.org/plugin-developmentOpen Fluentd Plugin Directory submit page (new tab)Fluentd Plugin Directory details
1768getfolio.dev—Link type unknowngetfolio.devDeveloper registriesFreeQuickMediumVerified liveCreate a founder/developer portfolio, pin your tool repository/project and add the official website link.Use a real GitHub identity and maintained projects; avoid a profile created only for SEO.2026-08-03Open getfolio.dev submit page (new tab)getfolio.dev details
1868Goodreads90Nofollowgoodreads.comProfiles and entitiesFreeQuickMediumVerified liveCreate a truthful your tool/founder profile or content page and add the website link where allowed.Use a real brand/founder identity; do not create thin duplicate pages. Listing link is currently reported nofollow.2026-07-30 • https://www.submission.directory/site/goodreadsOpen Goodreads submit page (new tab)Goodreads details
1968Hackage75Link type unknownhackage.haskell.orgDeveloper registriesFreeQuickMediumVerified liveRelease a useful Haskell library or command-line client with homepage, source and bug-report metadata.Hackage requires open-source, meaningful packages; uploaded versions cannot simply be replaced.Official Hackage upload page checked 2026-07-30Open Hackage submit page (new tab)Hackage details
2068HubPages85Nofollowhubpages.comProfiles and entitiesFreeQuickMediumVerified liveCreate a truthful your tool/founder profile or content page and add the website link where allowed.Use a real brand/founder identity; do not create thin duplicate pages. Listing link is currently reported nofollow.2026-07-30 • https://www.submission.directory/site/hubpagesOpen HubPages submit page (new tab)HubPages details
2168HundrED60Link type unknownhundred.orgProfiles and entitiesFreeQuickMediumVerified liveApply with a privacy/digital-safety education program that demonstrates real K-12 impact and scalability.Current Global Collection 2028 call closes 2027-05-01; normally implemented for 1+ year and reached 1,000+ children; evidence required.2026-08-05 — https://hundred.org/en/collections/hundred-global-collection-2028Open HundrED submit page (new tab)HundrED details
2268Jellyfin Plugin Catalog70Link type unknownjellyfin.orgMarketplaces and app storesFreeQuickMediumVerified liveBuild a functional Jellyfin privacy, metadata-cleanup, or local-safety plugin with a maintained manifest repository, then propose its repository and documentation entry.Third-party listing is curated through documentation; official inclusion is not guaranteed and the plugin must remain compatible with Jellyfin's ABI.Official Jellyfin plugin catalog and repository guidance checked 2026-08-05Open Jellyfin Plugin Catalog submit page (new tab)Jellyfin Plugin Catalog details
2368Knowledge Commons / CORE70Nofollowhcommons.orgDeveloper registriesFreeQuickMediumVerified liveCreate a truthful scholarly profile and deposit an original privacy, accessibility, or digital-humanities paper or teaching resource with its related your tool URL.Work must genuinely serve scholarship or pedagogy; upload only rights-cleared material, not sales copy.2026-08-05 — https://registry.hcommons.org/registry/co_petitions/start/coef%3A158Open Knowledge Commons / CORE submit page (new tab)Knowledge Commons / CORE details
2468LineZine20Link type unknownlinezine.comSoftware directoriesFreeQuickMediumVerified liveChoose the free listing or purchase a dedicated your tool product page.Free clicks are redirected/nofollow; paid option provides a dedicated dofollow page.https://linezine.com/list-your-toolOpen LineZine submit page (new tab)LineZine details
2568LuaRocks55Link type unknownluarocks.orgDeveloper registriesFreeQuickMediumVerified liveCreate a useful Lua client or helper, publish its rockspec and include homepage, license and source links.Only publish a working Lua module with correct dependencies and versioned source archives.Official LuaRocks page checked 2026-07-30Open LuaRocks submit page (new tab)LuaRocks details
2668Mastra Templates and Integrations50Link type unknownmastra.aiMarketplaces and app storesFreeQuickMediumVerified liveCreate a working public your tool integration or reusable Mastra template with repository and documentation for review and cross-listing.A working integration and public repository are required; documentation listing, partner placement, and co-marketing are not guaranteed.2026-08-05Open Mastra Templates and Integrations submit page (new tab)Mastra Templates and Integrations details
2768napari Hub40Link type unknownnapari-hub.orgMarketplaces and app storesFreeQuickMediumVerified liveCreate a useful npe2 napari plugin for image privacy, metadata inspection or scientific redaction, publish it correctly on PyPI and let the official hub index its project metadata.Must be a working napari plugin with correct manifest, classifiers, tests and PyPI metadata; directory pages expose project details but are not an endorsement.2026-08-05Open napari Hub submit page (new tab)napari Hub details
2868Participedia50Link type unknownparticipedia.netOther opportunitiesFreeQuickMediumVerified liveDocument a real participatory public-decision deployment as a Case, Method or Organization entry with evaluations and project URL.Community knowledge base, not a product directory; cite credible sources and show genuine participation outcomes.2026-08-05 — https://participedia.net/getting-startedOpen Participedia submit page (new tab)Participedia details
2968pckt—Link type unknownpckt.blogPublishing platformsFreeQuickMediumVerified liveCreate a genuine your tool publication and post substantial product research, tutorials or engineering notes.Sign-in is required; publish original long-form work rather than a link-only profile.2026-08-04Open pckt submit page (new tab)pckt details
3068ProcessWire Modules Directory65Link type unknownprocesswire.comOther opportunitiesFreeQuickMediumVerified liveBuild a ProcessWire admin module for external URL, metadata, accessibility or security audits, register as a module author and submit it to the official directory.Author login required; avoid duplicating existing SEO modules and provide a specific external-audit workflow with maintained source, documentation and support.2026-08-05Open ProcessWire Modules Directory submit page (new tab)ProcessWire Modules Directory details
3168RabbitMQ Community Plugins80Link type unknownrabbitmq.comMarketplaces and app storesFreeQuickMediumVerified liveBuild a stable open-source RabbitMQ plugin for a legitimate your tool security/privacy workflow and ask the RabbitMQ team to list it.Must be a real Erlang/OTP plugin, safely supervised, tested against supported RabbitMQ releases, distributed as an .ez artifact and maintained by its author.2026-08-05 — https://www.rabbitmq.com/plugin-developmentOpen RabbitMQ Community Plugins submit page (new tab)RabbitMQ Community Plugins details
3268Research Software Directory35Link type unknownresearch-software-directory.orgSoftware directoriesFreeQuickMediumVerified liveRequest access, then publish a rich your tool research-software page with source, getting-started URL, DOI, contributors, and research mentions.Only for genuine research software with evidence and public source or releases; truthful affiliation and ORCID information are required.2026-08-05 — https://research-software-directory.org/documentation/users/adding-software/Open Research Software Directory submit page (new tab)Research Software Directory details
3368Roadie Backstage Plugins Directory50Link type unknownroadie.ioMarketplaces and app storesFreeQuickMediumVerified livePublish a substantial open-source Backstage plugin that integrates your tool privacy/security checks, then request inclusion if the directory does not discover it.Plugin must be installable, documented and maintained; public directory inclusion is curated/indexed and not guaranteed merely by publishing an npm package.2026-08-05 — https://roadie.io/docs/details/requesting-plugins/Open Roadie Backstage Plugins Directory submit page (new tab)Roadie Backstage Plugins Directory details
3468SciCrunch RRID Resource Portal60Link type unknownscicrunch.orgOther opportunitiesFreeQuickMediumVerified liveRegister a stable, genuinely research-used your tool software, service, or database with accurate maintainer and version metadata.Must be a persistent research resource; acceptance or identifier assignment is curated and not intended for promotional listings.2026-08-05 — https://scicrunch.org/resources/about/resource?form=Resource&rel=26Open SciCrunch RRID Resource Portal submit page (new tab)SciCrunch RRID Resource Portal details
3568Silverstripe Add-ons60Link type unknownaddons.silverstripe.orgMarketplaces and app storesFreeQuickMediumVerified liveBuild a maintained Silverstripe CMS module for a useful your tool privacy, accessibility or URL-audit workflow, publish it with correct Composer metadata and submit it to the public directory.Module must be open and installable, follow Silverstripe conventions, document usage and compatibility, use tagged releases and accept ongoing code-quality and update responsibility.2026-08-05Open Silverstripe Add-ons submit page (new tab)Silverstripe Add-ons details
3668Sketchfab90Nofollowsketchfab.comProfiles and entitiesFreeQuickMediumVerified livePublish an original educational 3D asset connected to a real your tool tutorial, with accurate credits and a contextual project link in the description.Upload only content you own or can license; descriptions should explain the model rather than serve as link ads, and UGC links may be nofollow.2026-08-03Open Sketchfab submit page (new tab)Sketchfab details
3768Tolodora—Link type unknowntolodora.comSoftware directoriesFreeQuickMediumVerified liveAdd your tool as a SaaS or online service with its official URL.Use accurate categories and avoid duplicate or promotional spam entries.https://tolodora.com/Open Tolodora submit page (new tab)Tolodora details
3868Ulauncher Extensions40Link type unknownulauncher.ioLaunch platformsFreeQuickMediumVerified liveBuild a Python keyword extension that runs useful your tool URL, domain or metadata checks and displays concise results, then submit its public repository through the official form.Requires GitHub authentication and the current Ulauncher extension API; secure credentials and return useful in-launcher output instead of merely opening a marketing page.2026-08-05Open Ulauncher Extensions submit page (new tab)Ulauncher Extensions details
3968Venture by MyVenture—Link type unknownmyventure.devStartup directoriesFreeQuickMediumVerified liveCreate a founder profile, add your tool as a startup and share authentic milestones or metrics.Only share truthful metrics; keep the profile updated instead of using it as a one-link shell.2026-08-03Open Venture by MyVenture submit page (new tab)Venture by MyVenture details
4068Vim Online Scripts75Link type unknownvim.orgMarketplaces and app storesFreeQuickMediumVerified liveBuild and upload a genuinely useful Vim privacy or secret-checking plugin with your tool documentation and a relevant project link.Only publish a working original script; follow Vim script upload rules and avoid keyword-stuffed descriptions.2026-08-05Open Vim Online Scripts submit page (new tab)Vim Online Scripts details
4168WebThings Add-ons45Link type unknownwebthings.ioMarketplaces and app storesFreeQuickMediumVerified liveBuild a WebThings adapter, notifier, or interface extension for local privacy or device-risk controls, follow the add-on APIs, test on Gateway 2.x, and publish it to the directory.Must be an actual WebThings add-on, use unique non-misleading branding, document device/data access, and account for current 2.x compatibility.Official WebThings add-on directory and development guidance checked 2026-08-05Open WebThings Add-ons submit page (new tab)WebThings Add-ons details
42663D Slicer Extensions Catalog50Link type unknownextensions.slicer.orgMarketplaces and app storesFreeModerateMediumVerified liveBuild and test a Slicer extension for medical-image de-identification, metadata inspection or privacy validation, then add its .s4ext metadata to ExtensionIndex by pull request.Medical/scientific imaging relevance is mandatory; automated platform builds must pass and health/privacy claims need responsible validation.2026-08-05Open 3D Slicer Extensions Catalog submit page (new tab)3D Slicer Extensions Catalog details
4366ADPList60Nofollowadplist.orgReview platformsFreeModerateMediumVerified liveApply only if the founder or team member has real design/engineering leadership experience and intends to provide genuine mentoring, then add an accurate personal website/profile reference.Mentor approval criteria apply and a public profile must represent a real person, expertise, availability, and service—not a company backlink. Deliver actual mentorship and disclose AltFTool affiliation. Acceptance timing, profile discovery, external-link display, and rel/follow status are not guaranteed.2026-08-03Open ADPList submit page (new tab)ADPList details
4466Alpine Linux Packages70Link type unknownpkgs.alpinelinux.orgDeveloper registriesFreeModerateMediumVerified livePackage a stable your tool CLI or self-hosted helper as a tested APKBUILD, add it under Alpine testing and submit an aports merge request with accurate project metadata.A web wrapper will not qualify; software must run usefully on Alpine, pass lint/build checks and be maintained through review and repository promotion.2026-08-05Open Alpine Linux Packages submit page (new tab)Alpine Linux Packages details
4566Apps and Reports—Link type unknownappsandreports.comSoftware directoriesFreeModerateMediumVerified liveRegister as your tool vendor and add its software/service profile.Business and product information must be verifiable.https://www.appsandreports.com/vendor-registrationOpen Apps and Reports submit page (new tab)Apps and Reports details
4666ArtStation85Nofollowartstation.comOther opportunitiesFreeModerateMediumVerified livePublish an original UI/UX visual case study showing your tool interaction design, accessibility states, and design process, with a contextual project URL.Use ArtStation only if there is substantial original visual/design work, complete project metadata, and rights-cleared assets; it is not a generic SaaS listing. Disclose the creator's relationship to AltFTool. Projects and links are UGC, subject to platform moderation, and neither discovery nor followed-link status is guaranteed.2026-08-03Open ArtStation submit page (new tab)ArtStation details
4766balenaHub65Link type unknownhub.balena.ioOther opportunitiesFreeModerateMediumVerified liveBuild a deployable edge privacy utility or reusable block, add balena.yml metadata, public source, configuration and multi-device tests, then publish it on balenaHub.Must be a real balena app or block, link a GitHub repository, avoid embedded secrets, support claimed architectures, and maintain deployability.Official balena apps, blocks, and balenaHub publishing docs checked 2026-08-05Open balenaHub submit page (new tab)balenaHub details
4866Charmhub60Link type unknowncharmhub.ioOther opportunitiesFreeModerateMediumVerified livePackage a maintained self-hosted your tool deployment as a Juju charm with canonical documentation, source, and support links.Register the charm name, upload and release a tested charm; formal community review is required for search visibility.Official Charmcraft charm management documentation checked 2026-08-07Open Charmhub submit page (new tab)Charmhub details
4966Cinnamon Spices60Link type unknowncinnamon-spices.linuxmint.comMarketplaces and app storesFreeModerateMediumVerified liveBuild a maintained Cinnamon applet that launches or monitors a useful local your tool privacy workflow and submit it by pull request.Must follow the UUID/file structure, include info.json, screenshot and functional code, pass validate-spice, contain no malicious behavior, and pass team review.2026-08-05 — https://github.com/linuxmint/cinnamon-spices-appletsOpen Cinnamon Spices submit page (new tab)Cinnamon Spices details
5066CK-12 FlexBooks80Link type unknownck12.orgOther opportunitiesFreeModerateMediumVerified liveCreate an age-appropriate digital-citizenship or privacy FlexBook chapter with practical your tool exercises.Must be substantive K-12 educational content with correct authorship; do not create a product-only page.2026-08-05 — https://help.ck12.org/hc/en-us/articles/200448244-How-to-Customize-a-FlexBook-Textbook-or-Read-ModalityOpen CK-12 FlexBooks submit page (new tab)CK-12 FlexBooks details
5166Codidact Power Users40Nofollowcodidact.orgSoftware directoriesFreeModerateMediumVerified liveAnswer real end-user software or privacy questions in depth and reference a specific your tool page only when it materially completes the answer.Disclose affiliation; irrelevant or undisclosed product promotion is spam, and manufactured questions or generic link drops are prohibited.Official Codidact signup and help guidance checked 2026-08-07Open Codidact Power Users submit page (new tab)Codidact Power Users details
5266Coolify One-Click Services60Link type unknowncoolify.ioOther opportunitiesFreeModerateMediumVerified liveCreate and fully test an your tool Docker Compose service template, add metadata, logo, and documentation, then submit it to Coolify's next branch.The upstream Git repository currently needs at least 1,000 stars; template, secrets, storage, port, docs, and review rules apply.Official Coolify service-contribution guide checked 2026-08-05Open Coolify One-Click Services submit page (new tab)Coolify One-Click Services details
5366Creative Fabrica75Nofollowcreativefabrica.comMarketplaces and app storesFreeModerateMediumVerified liveApply as a designer and publish an original template, icon pack or printable that genuinely complements an your tool workflow.Products are reviewed and must be owned and licensed by the seller; personal contact details and unauthorized external links are restricted in product listings.2026-08-03Open Creative Fabrica submit page (new tab)Creative Fabrica details
5466Creative Market85Nofollowcreativemarket.comMarketplaces and app storesFreeModerateMediumVerified liveApply with a strong portfolio and sell an original your tool-compatible template or design kit, using permitted shop branding and product documentation.Shop approval requires a portfolio; products must be original, properly licensed and commercially useful. External-link placement is controlled by marketplace rules.2026-08-03Open Creative Market submit page (new tab)Creative Market details
5566dbt Package Hub65Link type unknownhub.getdbt.comDeveloper registriesFreeModerateMediumVerified liveBuild a useful dbt package for privacy classification, redaction tests or data-governance macros and add it to the Hub index by pull request.Must be a functional versioned dbt package with accurate package metadata, public source and releases; Hub index PR and automated compatibility checks apply.2026-08-05 — https://github.com/dbt-labs/hub.getdbt.comOpen dbt Package Hub submit page (new tab)dbt Package Hub details
5666devRant60Nofollowdevrant.comProfiles and entitiesFreeModerateMediumVerified liveParticipate as a real developer with original lessons and honest build stories; reference your tool only if a specific discussion genuinely calls for the working example.devRant treats accounts whose posts/comments mainly consist of links, duplicates, misleading identities, random comments, or purchased interactions as spam. Do not use a business name to mislead, disclose affiliation, and contribute without expecting a backlink. All links/posts are moderated UGC with no indexing or followed-link guarantee.2026-08-03Open devRant submit page (new tab)devRant details
5766DevShowcase—Link type unknowndevshowcase.devDesign galleriesFreeModerateMediumVerified liveSign in with GitHub or Google and add your tool as a real portfolio project with tech stack.Use an authentic developer identity and substantive project information.2026-08-03Open DevShowcase submit page (new tab)DevShowcase details
5866DHIS2 App Hub55Link type unknownapps.dhis2.orgSoftware directoriesFreeModerateMediumVerified liveBuild a generic DHIS2 health-data de-identification or permission-audit app and submit it to App Hub for core-team review.Must be useful across DHIS2 implementations, open source, documented, secure, performant, and free of advertising or hidden collection.Official DHIS2 App Hub publishing and review guidelines checked 2026-08-05Open DHIS2 App Hub submit page (new tab)DHIS2 App Hub details
5966Discourse Meta80Nofollowdiscourse.orgProfiles and entitiesFreeModerateMediumVerified liveUse a real developer profile and contribute tested solutions on Discourse integrations, accessibility, or privacy only when the team has genuine implementation experience.Meta is for improving Discourse discussions, not promoting AltFTool; spam, cross-posting, work solicitation outside Marketplace, and pasted AI replies are prohibited. Link only when essential, disclose affiliation, and never sign posts with promotional copy. Posts/profile links are moderated UGC with no permanence or followed-link guarantee.2026-08-03Open Discourse Meta submit page (new tab)Discourse Meta details
6066Ecwid App Market80Nofollowecwid.comMarketplaces and app storesFreeModerateMediumVerified liveBuild an your tool Ecwid app, propose it, sign the partner agreement, and submit it for review with website and support links.Requires a real public app, partner contract, review, support, and eligible legal and payments setup; listing is not guaranteed.Official Ecwid public app overview checked 2026-08-07Open Ecwid App Market submit page (new tab)Ecwid App Market details
6166EdTech Books55Link type unknownedtechbooks.orgPublishing platformsFreeModerateMediumVerified liveCreate a structured open handbook on digital privacy or accessibility with reproducible your tool labs.Use the publication workflow for a substantive book or proceedings item, clear all rights, and avoid thin SEO content.2026-08-05 — https://edtechbooks.s3.us-west-2.amazonaws.com/pdfs/40/3135.pdfOpen EdTech Books submit page (new tab)EdTech Books details
6266ELIXIR TeSS45Link type unknowntess.elixir-europe.orgOther opportunitiesFreeModerateMediumVerified liveRegister a substantive life-science privacy, medical-data de-identification, or research-data training resource hosted by your tool.Content must be relevant to life sciences or an adjacent field; account and accurate metadata required, while harvested providers need admin approval.2026-08-05 — https://tess.elixir-europe.org/about/registeringOpen ELIXIR TeSS submit page (new tab)ELIXIR TeSS details
6366Espanso Hub50Link type unknownespanso.orgDeveloper registriesFreeModerateMediumVerified liveCreate a genuinely useful package of tested security-header, HTML-meta, JSON-LD and webhook snippets with your tool validation examples, then submit it to the official Hub.Every package receives CI and human review, with extra scrutiny for scripts; avoid promotional expansions and any shell action that could harm users.2026-08-05Open Espanso Hub submit page (new tab)Espanso Hub details
6466EVERSE Research Software Quality Kit—Link type unknowneverse.softwareSoftware directoriesFreeModerateMediumVerified liveDiscuss a substantive your tool-backed research-software quality task or resource with the Editorial Board, then contribute through its approved workflow.Significant content should be discussed first; contribution must teach reusable practice rather than advertise.Official RSQKit contribution and editorial guides checked 2026-08-05Open EVERSE Research Software Quality Kit submit page (new tab)EVERSE Research Software Quality Kit details
6566FAIRsharing60Link type unknownfairsharing.orgOther opportunitiesFreeModerateMediumVerified liveSubmit a genuine your tool-maintained database, reusable reporting standard, or data policy with complete stewardship metadata.Generic software and individual datasets are out of scope; record type must match FAIRsharing scope and is curated.2026-08-05 — https://fairsharing.org/new/Open FAIRsharing submit page (new tab)FAIRsharing details
6666Fedora COPR70Link type unknowncopr.fedorainfracloud.orgDeveloper registriesFreeModerateMediumVerified liveCreate a COPR project, build maintained RPMs and add the official your tool homepage and package documentation.COPR is a build service rather than Fedora's main repository; provide legitimate source RPMs and support them.Official Fedora Developer Portal checked 2026-07-30Open Fedora COPR submit page (new tab)Fedora COPR details
6766FreeCAD Addons70Link type unknownfreecad.orgMarketplaces and app storesFreeModerateMediumVerified liveBuild an open-source FreeCAD privacy/metadata or document-cleanup workbench, add package.xml metadata, and submit it to the curated Addons index.Must be a real installable FreeCAD addon with supported license, repository metadata, docs and compatibility; catalog acceptance/review required.2026-08-05 — https://github.com/FreeCAD/FreeCAD-macrosOpen FreeCAD Addons submit page (new tab)FreeCAD Addons details
6866Glide Template Store70Nofollowglideapps.comMarketplaces and app storesFreeModerateMediumVerified livePublish a substantive Glide template for privacy-safe records, evidence organization, or accessibility audits and link its your tool documentation where permitted.The template must be original, reusable, polished, documented, privacy-safe, and pass review; a promotional shell will not qualify.Official Glide template publishing guide and Template Store terms checked 2026-08-07Open Glide Template Store submit page (new tab)Glide Template Store details
6966GNOME Shell Extensions75Link type unknownextensions.gnome.orgMarketplaces and app storesFreeModerateMediumVerified liveCreate a narrowly useful GNOME Shell extension, provide metadata and homepage or source information, and submit it for review.Must be GNOME Shell-specific, safe and policy-compliant; manual review queues can be slow.Official GNOME extension review page checked 2026-07-30Open GNOME Shell Extensions submit page (new tab)GNOME Shell Extensions details
7066GovStack45Link type unknowngovstack.globalOther opportunitiesFreeModerateMediumVerified liveJoin a working group and contribute a substantive building-block specification, use case, reference implementation or new proposal.Needs sustained expert contribution; Apache-2.0/IP terms apply; link must be directly relevant to the implementation.2026-08-05 — https://specs.govstack.global/overview/25q2-1/contributingOpen GovStack submit page (new tab)GovStack details
7166Gradle Plugin Portal80Link type unknowngradle.orgMarketplaces and app storesFreeModerateMediumVerified liveShip a genuinely useful Gradle plugin for an your tool developer check such as secret, licence, or configuration auditing; publish with your tool documentation and support URLs.Initial version is manually reviewed; the plugin needs real functionality, broad usefulness, public documentation, and accurate compatibility declarations.Official Gradle Plugin Portal publishing documentation checked 2026-08-07Open Gradle Plugin Portal submit page (new tab)Gradle Plugin Portal details
7266GRASS GIS Addons70Link type unknowngrass.osgeo.orgMarketplaces and app storesFreeModerateMediumVerified liveBuild a GRASS GIS add-on for location anonymization, sensitive-zone generalization, or privacy-safe geospatial export, include docs and tests, then submit it to the official add-ons repository.Must provide genuine GRASS functionality, follow programming and licensing rules, include a manual page and tests, and pass build and maintainer review.Official GRASS contribution page and current add-ons documentation checked 2026-08-05Open GRASS GIS Addons submit page (new tab)GRASS GIS Addons details
7366HAL Open Science85Link type unknownhal.scienceSoftware directoriesFreeModerateMediumVerified liveDeposit a research-level open-source your tool component or related preprint/report with accurate project and source links.Research-software or scholarly output only; accurate authorship, affiliation, rights, licence and metadata; deposits may be reviewed and cannot be self-deleted after acceptance.2026-08-05 — https://doc.hal.science/en/deposer/deposer-le-code-source/Open HAL Open Science submit page (new tab)HAL Open Science details
7466Humanitarian Data Exchange80Link type unknowndata.humdata.orgOther opportunitiesFreeModerateMediumVerified liveJoin an approved organization and publish a documented humanitarian privacy/safety dataset with licence and responsible-access settings.OCHA reviews organization identity and scope; data must be humanitarian, and sensitive data needs responsible handling; a PDF alone is not a dataset.2026-08-05 — https://centre.humdata.org/ufaqs/how-do-i-share-data-on-hdx/Open Humanitarian Data Exchange submit page (new tab)Humanitarian Data Exchange details
7566Icon-Icons70Nofollowicon-icons.comMarketplaces and app storesFreeModerateMediumVerified liveApply as the actual designer and publish a manually designed, consistent privacy or accessibility icon pack with an accurate public author profile.Approval and full rights are required; AI-generated icons are not accepted, and payout uses supported processors.Official Icon-Icons seller and contributor terms checked 2026-08-07Open Icon-Icons submit page (new tab)Icon-Icons details
7666IndieForge—Link type unknownindie-forge.netStartup directoriesFreeModerateMediumVerified liveCreate a truthful founder profile, showcase your tool, and participate consistently in relevant discussions.Value comes from ongoing genuine participation; one-off self-promotional link drops are inappropriate.2026-08-05 official login/community pagesOpen IndieForge submit page (new tab)IndieForge details
7766Journal of Open Source Education40Link type unknownjose.theoj.orgSoftware directoriesFreeModerateMediumVerified livePackage a complete computational privacy or accessibility learning module and submit its reusable artifact plus Markdown paper.Artifact must be feature-complete, immediately reusable, openly licensed, documented, and demonstrate teaching value.2026-08-05 — https://openjournals.readthedocs.io/en/jose/submitting.htmlOpen Journal of Open Source Education submit page (new tab)Journal of Open Source Education details
7866JS Bin80Nofollowjsbin.comDesign galleriesFreeModerateMediumVerified liveCreate a focused educational demo for one your tool technique and share the public bin from an authentic profile.Public bins are MIT-licensed and bots are prohibited; publish only compatible original code and create it manually.Official JS Bin getting-started and legal pages checked 2026-08-07Open JS Bin submit page (new tab)JS Bin details
7966KDE Store70Link type unknownstore.kde.orgMarketplaces and app storesFreeModerateMediumVerified livePublish a genuinely useful KDE or Plasma asset or integration with accurate project and homepage details.Content must fit a KDE Store category, respect licenses and trademarks, and pass moderation.Official KDE Store upload form checked 2026-07-30Open KDE Store submit page (new tab)KDE Store details
8066Launch.community—Link type unknownlaunch.communityLaunch platformsFreeModerateMediumVerified liveList only a genuine upcoming your tool major release with date and waitlist information.Requires Google sign-in and moderation; use only for a real upcoming release, not an evergreen listing.2026-08-05 official submit pageOpen Launch.community submit page (new tab)Launch.community details
8166ListYourTool—Link type unknownlistyourtool.comAI tool directoriesFreeModerateMediumVerified liveSubmit a concise your tool profile with its best differentiating utilities.Working public tool required; reviewed before publication.https://www.listyourtool.com/submit-toolOpen ListYourTool submit page (new tab)ListYourTool details
8266MentorCruise55Link type unknownmentorcruise.comReview platformsFreeModerateMediumVerified liveHave a qualified founder or senior team member apply as a privacy, accessibility, product, or engineering mentor and add your tool only as truthful experience/personal-site evidence.Applications are manually reviewed, typically within 14 days, and official help says fewer than 10% are accepted; a real headshot, bio, LinkedIn, and relevant expertise are required. The profile must support actual paid mentoring, not link placement. External links are profile UGC with no approval, traffic, or followed-link guarantee.2026-08-03Open MentorCruise submit page (new tab)MentorCruise details
8366MISP Modules60Link type unknownmisp-project.orgMarketplaces and app storesFreeModerateMediumVerified liveBuild a safe MISP import, export, hover, expansion, or workflow module for a legitimate privacy or scam-analysis use case, document it, test it, and submit a PR.Must implement introspection, handler, version metadata, configuration and error handling correctly; never transmit event data without explicit administrator control.Official MISP Modules contribution documentation checked 2026-08-05Open MISP Modules submit page (new tab)MISP Modules details
8466MyFreeAI Source—Link type unknownmyfreeaisource.comAI tool directoriesFreeModerateMediumVerified liveSubmit one genuinely AI-powered your tool route with its free-access details, official URL, privacy terms and relationship disclosure.Only free, freemium, open-source or free-trial AI tools fit; submissions are saved as drafts and reviewed, so do not submit the non-AI umbrella product as AI.2026-08-03 • https://myfreeaisource.com/submit-ai-tool/Open MyFreeAI Source submit page (new tab)MyFreeAI Source details
8566Netdata Integrations70Link type unknownnetdata.cloudMarketplaces and app storesFreeModerateMediumVerified liveContribute a working collector or alert integration for measurable your tool service/privacy signals with metadata and documentation.Requires tested production-quality collector code, integration metadata, docs and alerts where appropriate; upstream review determines inclusion.2026-08-05 — https://learn.netdata.cloud/docs/developer-and-contributor-corner/contributingOpen Netdata Integrations submit page (new tab)Netdata Integrations details
8666Nmap NSE Documentation80Link type unknownnmap.orgReview platformsFreeModerateMediumVerified liveDevelop a safe, useful Nmap NSE script related to an your tool security check and include accurate author or homepage metadata.Script must be original, valuable, documented, tested, properly licensed, and accepted into Nmap; never add intrusive behavior merely for exposure.2026-08-05 — https://nmap.org/book/nse-script-format.htmlOpen Nmap NSE Documentation submit page (new tab)Nmap NSE Documentation details
8766Octopus40Link type unknownoctopus.acOther opportunitiesFreeModerateMediumVerified liveUse ORCID to publish genuine research stages—problem, method, data or analysis—with contextual your tool code/data links.Research record only, not marketing; stages must connect accurately and follow licensing, authorship and research-ethics rules.2026-08-05 — https://www.octopus.ac/Open Octopus submit page (new tab)Octopus details
8866Omeka S Modules65Link type unknownomeka.orgOther opportunitiesFreeModerateMediumVerified liveCreate a maintained Omeka S module for collection metadata privacy, accessibility or link auditing, package it correctly and register the add-on with project and author links.Must be a functional Omeka module with compatible releases, clear documentation and support; directory review does not constitute a security endorsement.2026-08-05Open Omeka S Modules submit page (new tab)Omeka S Modules details
8966Open Research Knowledge Graph45Link type unknownorkg.orgOther opportunitiesFreeModerateMediumVerified liveCreate a rigorous structured comparison of published privacy, redaction, or accessibility studies and include your tool only when supported by research.Model at least two scholarly contributions accurately, cite sources, avoid self-serving comparisons, and accept permanent versioning.2026-08-05 — https://academy.orkg.org/courses/comparison-course.htmlOpen Open Research Knowledge Graph submit page (new tab)Open Research Knowledge Graph details
9066Open Source Observer30Link type unknownopensource.observerDeveloper registriesFreeModerateMediumVerified liveOpen-source an your tool component, then add its website and repositories through the official oss-directory PR.Requires maintained public artifacts and a reviewable PR; no placeholder repositories.2026-08-03Open Open Source Observer submit page (new tab)Open Source Observer details
9166OpenCTI Integrations Library45Link type unknownopencti.ioMarketplaces and app storesFreeModerateMediumVerified liveBuild a secure OpenCTI connector that imports or exports a legitimate your tool-supported CTI workflow, add tests and documentation, and contribute it for library integration.Must follow connector architecture, licensing, CI, release, data-quality, and security requirements; review determines library inclusion.Official OpenCTI connectors repository and development docs checked 2026-08-05Open OpenCTI Integrations Library submit page (new tab)OpenCTI Integrations Library details
9266OpenResty Package Manager45Link type unknownopm.openresty.orgDeveloper registriesFreeModerateMediumVerified livePublish an open-source Lua/OpenResty package that integrates an your tool privacy or security workflow and includes honest package metadata.Package must use an accepted open-source licence, valid dist.ini metadata, GitHub identity verification, versioning, and the official opm upload process.2026-08-05 — https://opm.openresty.org/docsOpen OpenResty Package Manager submit page (new tab)OpenResty Package Manager details
9366OpenSearch Catalog70Link type unknownopensearch.orgMarketplaces and app storesFreeModerateMediumVerified liveContribute a functional privacy/security integration, dashboard or ingestion-to-visualization content pack through the OpenSearch Catalog workflow.Artifact must match the catalog schema, be useful to OpenSearch users, include accurate docs/source metadata, use Apache-2.0-compatible contribution terms and pass review.2026-08-05 — https://github.com/opensearch-project/opensearch-catalogOpen OpenSearch Catalog submit page (new tab)OpenSearch Catalog details
9466OSF85Nofollowosf.ioOther opportunitiesFreeModerateMediumVerified liveCreate a public reproducibility project for your tool research, datasets, test methods, or privacy benchmarks and link the genuine project/site.Best for real research workflows. Projects start private; review files and metadata before making them public.https://help.osf.io/article/285-control-your-privacy-settingsOpen OSF submit page (new tab)OSF details
9566ownCloud Marketplace65Link type unknownmarketplace.owncloud.comMarketplaces and app storesFreeModerateMediumVerified liveBuild a useful ownCloud app that invokes or embeds an your tool privacy, document or URL-audit workflow, code-sign it and publish it through the official marketplace.Check for an existing similar app first; use an open version-controlled repository, compatible licence and complete metadata. Marketplace upload requires ownCloud code signing, and new apps begin with experimental trust.2026-08-05Open ownCloud Marketplace submit page (new tab)ownCloud Marketplace details
9666Particle Community Libraries70Link type unknownparticle.ioPublishing platformsFreeModerateMediumVerified liveBuild and test a Particle Device OS privacy, local-processing, or credential-safety library with examples, license, README, and repository URL, then publish it via the CLI.Library name must be unique; public versions are immutable, relevant hardware builds must pass, examples and license are required, and Verified status needs extra review.Official Particle library contribution and CLI docs checked 2026-08-05Open Particle Community Libraries submit page (new tab)Particle Community Libraries details
9766PKP Plugin Gallery75Link type unknownpkp.sfu.caMarketplaces and app storesFreeModerateMediumVerified liveDevelop an OJS/OMP/OPS plugin for a genuine accessibility, privacy or publication-validation workflow, release it with gallery metadata and submit through PKP's review flow.Requires supported platform versions, real publishing functionality, compatible licensing, maintained releases and correct gallery packaging.2026-08-05Open PKP Plugin Gallery submit page (new tab)PKP Plugin Gallery details
9866Plunker70Nofollowplnkr.coDesign galleriesFreeModerateMediumVerified liveBuild a working mini-project showing an your tool browser-side feature and publish its indexed share page with useful documentation.Keep the project executable, original, educational, and free of credentials or user data.Official Plunker feature documentation checked 2026-08-07Open Plunker submit page (new tab)Plunker details
9966portfolio.dev—Link type unknownportfolio.devOther opportunitiesFreeModerateMediumVerified liveCreate a public case-study portfolio and add your tool with screenshots, live demo and build rationale.Publish a genuine project case study rather than a thin promotional card.2026-08-03Open portfolio.dev submit page (new tab)portfolio.dev details
10066Product Launchpad—Link type unknownproductlaunchpad.appLaunch platformsFreeModerateMediumVerified liveSubmit a complete your tool launch profile, then answer relevant discussions authentically.Email sign-in and moderation; forum activity must be useful, not link drops; X/GitHub verification may apply.2026-08-05 official submit pageOpen Product Launchpad submit page (new tab)Product Launchpad details

How to build backlinks with this list

Four steps that work for a new site, a SaaS or a side project. No paid link packages, nothing that risks a penalty.

  1. Get the basics right first

    Before submitting anywhere, have a one-line description, a 150-word description, a square logo and two or three screenshots ready. Every form asks for some mix of these.

  2. Claim profiles and free listings

    Start with the free, quick rows: profile creation sites and free directories. They are one form each and build the entity signals search engines use to understand who you are.

  3. Go after a few strong links

    Then pick a handful of high DA and dofollow sites that fit your niche, and write proper guest posts or launch posts for them. Ten relevant links beat a hundred random ones.

  4. Track and keep it clean

    Note where you submitted and when. Recheck after a month, update stale descriptions, and never pay for bulk link packages: they put the whole site at risk.

Behind the list

A link opportunity is not a link.

Every row here starts as a line in a sheet, gets normalised into one of 16 groups, scored for cost, effort and impact, and written up with the steps to actually submit. The floor below represents that pipeline.

Open the sheet view

An illustration of the AltF Backlinks floor: opportunities sourced at the back, vetted for cost and effort by the engineering pod, written up for outreach by the design pod, then tracked to placement along a line.

Backlink sites by category

Common questions

Do backlinks still matter for ranking in 2026?
Links remain one signal among many, and low-quality bulk links do more harm than good. What still works is being listed where your buyers actually look — directories with real traffic, registries your peers use, and launch platforms with engaged audiences. Every entry in this list is a place a human might plausibly find you, which is why they are worth submitting to regardless of link equity.
Which submissions should I do first?
Start with the quick wins filter: free, low effort, and not in the lowest priority band. 208 of the 1,964 entries qualify, and those are the ones where a single form submission gets you a live listing the same week. Launch platforms are worth saving until your product is genuinely ready, because you only get one good attempt at each.
How is the impact score calculated?
It starts from a hand-assigned priority band (do first, high, medium, later), then adjusts for cost and effort. A free, quick opportunity scores above a paid, involved one in the same band, because it is the one you can realistically finish today. The score is a queueing aid, not a measure of domain authority.
Are these links free?
1,628 of the 1,964 entries are free to submit to or offer a free tier that includes a listing. Cost is shown on every row, and the "nothing to pay" filter narrows the list to exactly those.
Which backlink sites are dofollow?
44 entries are known to give a followed link on a normal listing, and more give one only in some placements. The link type is shown on every row and can be filtered. Sites change their link policy without notice, so treat the label as a starting point and check the live page after you are listed. A nofollow link from a busy site still sends visitors and helps search engines discover you.
What does the DA number mean?
It is our estimate of the site's domain authority, a third-party style 0-100 score of how strong a domain's link profile is, rounded to the nearest 5. 1,580 of the 1,964 sites have one. It is useful for comparing sites, not a Google metric, so relevance to your niche still matters more.
How do I get backlinks for a new website?
1. Get the basics right first: Before submitting anywhere, have a one-line description, a 150-word description, a square logo and two or three screenshots ready. Every form asks for some mix of these. 2. Claim profiles and free listings: Start with the free, quick rows: profile creation sites and free directories. They are one form each and build the entity signals search engines use to understand who you are. 3. Go after a few strong links: Then pick a handful of high DA and dofollow sites that fit your niche, and write proper guest posts or launch posts for them. Ten relevant links beat a hundred random ones. 4. Track and keep it clean: Note where you submitted and when. Recheck after a month, update stale descriptions, and never pay for bulk link packages: they put the whole site at risk.
Will submitting everywhere hurt my site?
Submitting to spam directories can. That is why this list is curated rather than scraped, and why entries carry a status showing whether they have been verified as live. Skip anything that promises hundreds of links for a fee, and prefer places where a real person reviews submissions.