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A maintained list of 1,854 legitimate backlink sites: directories, profile creation sites, guest posting sites, launch platforms, registries and marketplaces. 1,532 are free or have a free tier, 44 usually give a dofollow link, and 772 have an estimated DA of 70 or more. Every row shows authority, link type, cost and effort, and links straight to the submit page.
The table is wider than the screen — swipe it sideways for cost, effort and the preparation notes.
| # | Impact (sorted) | Site — sort by this | Est. DA — sort by this | Link | Domain | Type | Cost | Effort — sort by this | Priority | Status | What to prepare | Rules / caveat | Checked | Actions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 601 | 66 | DHIS2 App Hub | 55 | Link type unknown | apps.dhis2.org | Software directories | Free | Moderate | Medium | Verified live | Build 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 2026-08-05 | Open DHIS2 App Hub submit page (new tab)DHIS2 App Hub details |
| 602 | 66 | Discourse Meta | 80 | Nofollow | discourse.org | Profiles and entities | Free | Moderate | Medium | Verified live | Use 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. | 2026-08-03 | Open Discourse Meta submit page (new tab)Discourse Meta details |
| 603 | 66 | Docusaurus Showcase | 75 | Link type unknown | docusaurus.io | Design galleries | Free | Moderate | Medium | Live, conditional | If your tool documentation genuinely runs on Docusaurus, add the polished docs site through the official showcase discussion. | Framework use is mandatory; maintain a polished live site and follow the current GitHub discussion template. | 2026-08-05 | Open Docusaurus Showcase submit page (new tab)Docusaurus Showcase details |
| 604 | 66 | Ecwid App Market | 80 | Nofollow | ecwid.com | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Build 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 2026-08-07 | Open Ecwid App Market submit page (new tab)Ecwid App Market details |
| 605 | 66 | EdTech Books | 55 | Link type unknown | edtechbooks.org | Publishing platforms | Free | Moderate | Medium | Verified live | Create 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.pdf | Open EdTech Books submit page (new tab)EdTech Books details |
| 606 | 66 | ELIXIR TeSS | 45 | Link type unknown | tess.elixir-europe.org | Other opportunities | Free | Moderate | Medium | Verified live | Register 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/registering | Open ELIXIR TeSS submit page (new tab)ELIXIR TeSS details |
| 607 | 66 | Espanso Hub | 50 | Link type unknown | espanso.org | Developer registries | Free | Moderate | Medium | Verified live | Create 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. | 2026-08-05 | Open Espanso Hub submit page (new tab)Espanso Hub details |
| 608 | 66 | FAIRsharing | 60 | Link type unknown | fairsharing.org | Other opportunities | Free | Moderate | Medium | Verified live | Submit 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 |
| 609 | 66 | Fedora COPR | 70 | Link type unknown | copr.fedorainfracloud.org | Developer registries | Free | Moderate | Medium | Verified live | Create 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 2026-07-30 | Open Fedora COPR submit page (new tab)Fedora COPR details |
| 610 | 66 | FileHippo | 85 | Nofollow | filehippo.com | Software directories | Free | Moderate | Medium | Needs checking | Contact them to have your Windows or Mac software added to the catalogue. | Editorial choice; files are scanned before listing. | Added 2026-11-01 | Open FileHippo submit page (new tab)FileHippo details |
| 611 | 66 | FileHorse | 70 | Link type unknown | filehorse.com | Software directories | Free | Moderate | Medium | Needs checking | Send your Windows or Mac software for review via their submission or contact page. | Editors only list software they consider useful and clean. | Added 2026-11-01 | Open FileHorse submit page (new tab)FileHorse details |
| 612 | 66 | Firefox Add-ons | 95 | Nofollow | addons.mozilla.org | Marketplaces and app stores | Free | Moderate | Medium | Not submitted | Publish privacy/helper extension. | Requires real extension and Mozilla review. | 2026-07-30 | Open Firefox Add-ons submit page (new tab)Firefox Add-ons details |
| 613 | 66 | Flathub | 75 | Nofollow | flathub.org | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Submit a mature graphical Linux your app with verified metadata, screenshots, homepage and source links. | Strictly requires a functional Flatpak; current Flathub policy disallows generative-AI-assisted submission code, content and review comments. | Official Flathub submission docs checked 2026-07-30 | Open Flathub submit page (new tab)Flathub details |
| 614 | 66 | FreeCAD Addons | 70 | Link type unknown | freecad.org | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Build 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-macros | Open FreeCAD Addons submit page (new tab)FreeCAD Addons details |
| 615 | 66 | FSF Free Software Directory | 85 | Link type unknown | fsf.org | Software directories | Free | Moderate | Medium | Not submitted | Release a genuinely free-software your tool desktop or self-hosted component with free documentation and transparent downloads, then submit a custom directory entry. | Software must meet FSF freedom, documentation and GNU/free-OS requirements and pass administrator review; the web-only proprietary service is not eligible by itself. | 2026-08-03 | Open FSF Free Software Directory submit page (new tab)FSF Free Software Directory details |
| 616 | 66 | Glide Template Store | 70 | Nofollow | glideapps.com | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Publish 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 2026-08-07 | Open Glide Template Store submit page (new tab)Glide Template Store details |
| 617 | 66 | GNOME Shell Extensions | 75 | Link type unknown | extensions.gnome.org | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Create 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 2026-07-30 | Open GNOME Shell Extensions submit page (new tab)GNOME Shell Extensions details |
| 618 | 66 | GovStack | 45 | Link type unknown | govstack.global | Other opportunities | Free | Moderate | Medium | Verified live | Join 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/contributing | Open GovStack submit page (new tab)GovStack details |
| 619 | 66 | Gradle Plugin Portal | 80 | Link type unknown | gradle.org | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Ship 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 2026-08-07 | Open Gradle Plugin Portal submit page (new tab)Gradle Plugin Portal details |
| 620 | 66 | GRASS GIS Addons | 70 | Link type unknown | grass.osgeo.org | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Build 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 2026-08-05 | Open GRASS GIS Addons submit page (new tab)GRASS GIS Addons details |
| 621 | 66 | Grav GPM | 70 | Link type unknown | getgrav.org | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Create a useful Grav privacy or security plugin and request inclusion through the official repository issue process. | Team reviews code and metadata against project standards; blueprint, release and homepage fields must be accurate. | 2026-08-05 official Grav GPM documentation | Open Grav GPM submit page (new tab)Grav GPM details |
| 622 | 66 | HackMD | 75 | Nofollow | hackmd.io | Developer registries | Free | Moderate | Medium | Live, conditional | Create a substantive public tutorial or implementation note that uses your tool and includes a contextual source/product link. | Public notes must provide original useful content; avoid duplicated marketing copy and disclose affiliation where appropriate. | https://hackmd.io/c/tutorials/%2Fs%2Fhow-to-publish-note | Open HackMD submit page (new tab)HackMD details |
| 623 | 66 | HAL Open Science | 85 | Link type unknown | hal.science | Software directories | Free | Moderate | Medium | Verified live | Deposit 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 |
| 624 | 66 | Harvard Dataverse | 95 | Link type unknown | dataverse.harvard.edu | Developer registries | Free | Moderate | Medium | Live, conditional | Deposit a genuine your tool benchmark, evaluation dataset or reproducibility bundle with project URL in the description/metadata. | Account and appropriate collection permissions are required; data must have lawful sharing rights and complete citation metadata. | https://guides.dataverse.org/en/latest/user/dataset-management.html | Open Harvard Dataverse submit page (new tab)Harvard Dataverse details |
| 625 | 66 | Help a B2B Writer | 45 | Link type unknown | helpab2bwriter.com | PR and source platforms | Free | Moderate | Medium | Needs checking | Register as source for B2B content quote opportunities. | Use tech/SaaS/privacy expertise categories. | 2026-07-30 | Open Help a B2B Writer submit page (new tab)Help a B2B Writer details |
| 626 | 66 | Homebrew | 40 | Link type unknown | homebrew.sh | Software directories | Free | Moderate | Medium | Not submitted | If your tool ships a macOS CLI or desktop helper, create a maintained tap with a real release, version, checksum, and official homepage metadata. | This is unsuitable for a web-only product; the package must install correctly and releases, checksums, and maintenance must remain current. | 2026-08-03 | Open Homebrew submit page (new tab)Homebrew details |
| 627 | 66 | Homebrew | 75 | Link type unknown | brew.sh | Other opportunities | Free | Moderate | Medium | Live, conditional | After releasing a real your tool CLI or native app, submit a tested formula or cask with its canonical homepage. | Formula must meet open-source, stability, build and test rules; casks need a supported upstream binary and notability may affect acceptance. | 2026-08-05 official Homebrew Adding Software and Acceptable Formulae guides | Open Homebrew submit page (new tab)Homebrew details |
| 628 | 66 | Huawei AppGallery | 90 | Nofollow | developer.huawei.com | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Publish an your tool Android app through AppGallery Connect with official site, support and privacy URLs. | Identity verification, app package, localized metadata, privacy policy and AppGallery review are required. | https://developer.huawei.com/consumer/en/appgallery/ | Open Huawei AppGallery submit page (new tab)Huawei AppGallery details |
| 629 | 66 | Humanitarian Data Exchange | 80 | Link type unknown | data.humdata.org | Other opportunities | Free | Moderate | Medium | Verified live | Join 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 |
| 630 | 66 | Icon-Icons | 70 | Nofollow | icon-icons.com | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Apply 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 2026-08-07 | Open Icon-Icons submit page (new tab)Icon-Icons details |
| 631 | 66 | Internet Archive | 95 | Nofollow | archive.org | Software directories | Free | Moderate | Medium | Live, conditional | Archive an authentic your tool release, manual or research artifact with accurate metadata and official source URL. | Upload only material you own or may redistribute; item metadata must describe a real archival object, not an SEO-only page. | https://archive.org/create/ | Open Internet Archive submit page (new tab)Internet Archive details |
| 632 | 66 | ITNEXT | 60 | Nofollow | itnext.io | Guest posting sites | Free | Moderate | Medium | Needs checking | Request writer access for the publication and submit engineering, cloud or DevOps articles via Medium. | Only original technical content is accepted; links inside Medium posts are typically nofollow. | Added 2026-11-01 | Open ITNEXT submit page (new tab)ITNEXT details |
| 633 | 66 | IzzyOnDroid | 40 | Link type unknown | izzyondroid.com | Software directories | Free | Moderate | Medium | Live, conditional | If your tool releases a suitable open-source Android app, request inclusion with public source, tagged APK releases, Fastlane metadata and website links. | Must meet the current inclusion policy, disclose anti-features, avoid silent binary downloads, pass scans and remain maintained; review is strict. | 2026-08-05 official IzzyOnDroid repository README, inclusion policy and current issue route | Open IzzyOnDroid submit page (new tab)IzzyOnDroid details |
| 634 | 66 | JavaScript in Plain English | 60 | Nofollow | plainenglish.io | Guest posting sites | Free | Moderate | Medium | Needs checking | Apply to become a writer for the In Plain English publications and submit clear programming tutorials. | Posts are reviewed for quality and must be tutorials or experience pieces, not ads; most links are nofollow. | Added 2026-11-01 | Open JavaScript in Plain English submit page (new tab)JavaScript in Plain English details |
| 635 | 66 | JitPack | 65 | Link type unknown | jitpack.io | Developer registries | Free | Moderate | Medium | Live, conditional | Release a useful your tool JVM or Android library from GitHub with a working build, release tag, README and canonical project links. | JitPack builds on demand; a valid Gradle, Maven, SBT or Leiningen build and real reusable library are required. | 2026-08-05 official JitPack introduction and build guide | Open JitPack submit page (new tab)JitPack details |
| 636 | 66 | Journal of Open Source Education | 40 | Link type unknown | jose.theoj.org | Software directories | Free | Moderate | Medium | Verified live | Package 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.html | Open Journal of Open Source Education submit page (new tab)Journal of Open Source Education details |
| 637 | 66 | JS Bin | 80 | Nofollow | jsbin.com | Design galleries | Free | Moderate | Medium | Verified live | Create 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 2026-08-07 | Open JS Bin submit page (new tab)JS Bin details |
| 638 | 66 | JSON Schema Store | 55 | Link type unknown | schemastore.org | Other opportunities | Free | Moderate | Medium | Live, conditional | After your tool has a stable, commonly used JSON or YAML configuration format, contribute its accurate schema and test fixtures so editors can provide validation, completion, and tooltips. | SchemaStore is for known file formats, not marketing pages. The schema must be valid, match real files, include the required catalog metadata and tests, pass CI, and stay synchronized with product changes; submit through the community repository review process. | 2026-08-03 | Open JSON Schema Store submit page (new tab)JSON Schema Store details |
| 639 | 66 | Kagi Small Web | 70 | Link type unknown | kagi.com | Business directories | Free | Moderate | Medium | Needs checking | Submit your tool (or its blog/feed where required) under productivity, privacy or developer tools. | Human review may apply; use a natural brand title and avoid keyword stuffing. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/kagi-small-web | Open Kagi Small Web submit page (new tab)Kagi Small Web details |
| 640 | 66 | KDE Store | 70 | Link type unknown | store.kde.org | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Publish 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 2026-07-30 | Open KDE Store submit page (new tab)KDE Store details |
| 641 | 66 | Kirby Plugins | 50 | Link type unknown | plugins.getkirby.com | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Build an your tool metadata-cleaning, accessibility or privacy plugin and submit its repository and cover image. | Needs functional Kirby-specific value, a clear README, licence and maintained Git tags; submission is reviewed. | 2026-08-05 official Kirby Plugins submission page | Open Kirby Plugins submit page (new tab)Kirby Plugins details |
| 642 | 66 | Krew | 55 | Link type unknown | krew.sigs.k8s.io | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Build a real kubectl your tool privacy or security scanner and submit its release manifest with a canonical project homepage. | Plugin must be open source, independently useful, SemVer-released and tested; maintainers review every submission. | 2026-08-05 official Krew new-plugin developer guide | Open Krew submit page (new tab)Krew details |
| 643 | 66 | LiveJournal | 90 | Nofollow | livejournal.com | Profiles and entities | Free | Moderate | Medium | Not submitted | Create 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. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/livejournal | Open LiveJournal submit page (new tab)LiveJournal details |
| 644 | 66 | MacUpdate | 75 | Nofollow | macupdate.com | Software directories | Free | Moderate | Medium | Needs checking | Add your Mac app and keep version updates current so users get notified. | Mac apps only; listings must link to the official download. | Added 2026-11-01 | Open MacUpdate submit page (new tab)MacUpdate details |
| 645 | 66 | MajorGeeks | 80 | Link type unknown | majorgeeks.com | Software directories | Free | Moderate | Medium | Needs checking | Submit your Windows utility with a PAD file or download link for editorial review. | Every program is tested by staff; bundled toolbars or adware are rejected. | Added 2026-11-01 | Open MajorGeeks submit page (new tab)MajorGeeks details |
| 646 | 66 | MentorCruise | 55 | Link type unknown | mentorcruise.com | Review platforms | Free | Moderate | Medium | Verified live | Have 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. | 2026-08-03 | Open MentorCruise submit page (new tab)MentorCruise details |
| 647 | 66 | MISP Modules | 60 | Link type unknown | misp-project.org | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Build 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 2026-08-05 | Open MISP Modules submit page (new tab)MISP Modules details |
| 648 | 66 | Netdata Integrations | 70 | Link type unknown | netdata.cloud | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Contribute 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/contributing | Open Netdata Integrations submit page (new tab)Netdata Integrations details |
| 649 | 66 | Nixpkgs | 75 | Link type unknown | nixos.org | Developer registries | Free | Moderate | Medium | Live, conditional | Package a real your tool CLI or desktop utility, set accurate homepage metadata, test it, and submit the Nixpkgs pull request. | Package must build reproducibly, meet Nixpkgs standards and pass review; the homepage shown on search.nixos.org must be canonical. | 2026-08-05 official Nixpkgs manual and NixOS contribution guide | Open Nixpkgs submit page (new tab)Nixpkgs details |
| 650 | 66 | NLnet Foundation | 65 | Link type unknown | nlnet.nl | Other opportunities | Free | Moderate | Medium | Live, conditional | Apply with a concrete your tool privacy, security or user-autonomy FOSS work package, milestones, budget and public repository. | Highly selective; active-call fit and fully FOSS/open results required. Only accepted projects receive a linked public page. | 2026-08-04 | Open NLnet Foundation submit page (new tab)NLnet Foundation details |
| 651 | 66 | Nmap NSE Documentation | 80 | Link type unknown | nmap.org | Review platforms | Free | Moderate | Medium | Verified live | Develop 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.html | Open Nmap NSE Documentation submit page (new tab)Nmap NSE Documentation details |
| 652 | 66 | Octopus | 40 | Link type unknown | octopus.ac | Other opportunities | Free | Moderate | Medium | Verified live | Use 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 |
| 653 | 66 | Omeka S Modules | 65 | Link type unknown | omeka.org | Other opportunities | Free | Moderate | Medium | Verified live | Create 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. | 2026-08-05 | Open Omeka S Modules submit page (new tab)Omeka S Modules details |
| 654 | 66 | OnePageCRM Integration Marketplace | 65 | Link type unknown | onepagecrm.com | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Build a working OnePageCRM integration and apply for testing, verification and a dedicated marketplace page. | A live or actively built integration is required; technical/UX review and partner approval control publication. | https://www.onepagecrm.com/partner-program/integrations/ | Open OnePageCRM Integration Marketplace submit page (new tab)OnePageCRM Integration Marketplace details |
| 655 | 66 | ooh.directory | 40 | Link type unknown | ooh.directory | Business directories | Free | Moderate | Medium | Needs checking | Suggest your personal or independent blog through the site's suggestion option. | Hand-picked by the curator; company marketing blogs are rarely added. | Added 2026-11-01 | Open ooh.directory submit page (new tab)ooh.directory details |
| 656 | 66 | opam Repository | 55 | Link type unknown | opam.ocaml.org | Developer registries | Free | Moderate | Medium | Live, conditional | Publish a real OCaml library or CLI integration and use opam's homepage field for its canonical your tool project page. | Requires a tagged source release, valid opam metadata, linting and community repository review. | 2026-08-05 official opam packaging guide | Open opam Repository submit page (new tab)opam Repository details |
| 657 | 66 | Open Research Knowledge Graph | 45 | Link type unknown | orkg.org | Other opportunities | Free | Moderate | Medium | Verified live | Create 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.html | Open Open Research Knowledge Graph submit page (new tab)Open Research Knowledge Graph details |
| 658 | 66 | Open Science Framework | 85 | Nofollow | osf.io | Developer registries | Free | Moderate | Medium | Live, conditional | Create a genuine your tool study, reproducibility project or benchmark workspace with project links and public materials. | Use only for bona fide research or open project materials; accurate contributors, licensing and non-promotional descriptions are expected. | https://help.osf.io/article/353-welcome-to-projects | Open Open Science Framework submit page (new tab)Open Science Framework details |
| 659 | 66 | Open Source Observer | 30 | Link type unknown | opensource.observer | Developer registries | Free | Moderate | Medium | Verified live | Open-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. | 2026-08-03 | Open Open Source Observer submit page (new tab)Open Source Observer details |
| 660 | 66 | OpenCTI Integrations Library | 45 | Link type unknown | opencti.io | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Build 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 2026-08-05 | Open OpenCTI Integrations Library submit page (new tab)OpenCTI Integrations Library details |
| 661 | 66 | OpenResty Package Manager | 45 | Link type unknown | opm.openresty.org | Developer registries | Free | Moderate | Medium | Verified live | Publish 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/docs | Open OpenResty Package Manager submit page (new tab)OpenResty Package Manager details |
| 662 | 66 | OpenSearch Catalog | 70 | Link type unknown | opensearch.org | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Contribute 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-catalog | Open OpenSearch Catalog submit page (new tab)OpenSearch Catalog details |
| 663 | 66 | Opera Add-ons | 90 | Nofollow | opera.com | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Package a useful your tool browser feature as an Opera extension and submit it for moderation. | Extension needs one clear purpose, complete metadata, policy compliance, and moderator approval. | https://help.opera.com/en/extensions/publishing-guidelines/ | Open Opera Add-ons submit page (new tab)Opera Add-ons details |
| 664 | 66 | OSF | 85 | Nofollow | osf.io | Other opportunities | Free | Moderate | Medium | Verified live | Create 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-settings | Open OSF submit page (new tab)OSF details |
| 665 | 66 | ownCloud Marketplace | 65 | Link type unknown | marketplace.owncloud.com | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Build 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. | 2026-08-05 | Open ownCloud Marketplace submit page (new tab)ownCloud Marketplace details |
| 666 | 66 | Padlet | 85 | Nofollow | padlet.com | Publishing platforms | Free | Moderate | Medium | Not submitted | Create a public searchable board that teaches a privacy workflow and links to supporting standards, guides, and relevant your tool utilities. | Public visibility must be enabled because boards default to restricted sharing; free limits apply and self-link-only boards add little value. | 2026-08-03 | Open Padlet submit page (new tab)Padlet details |
| 667 | 66 | Particle Community Libraries | 70 | Link type unknown | particle.io | Publishing platforms | Free | Moderate | Medium | Verified live | Build 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 2026-08-05 | Open Particle Community Libraries submit page (new tab)Particle Community Libraries details |
| 668 | 66 | Pearltrees | 80 | Nofollow | pearltrees.com | Publishing platforms | Free | Moderate | Medium | Not submitted | Create a structured collection about privacy-preserving web utilities and mix selected your tool pages with respected references. | Curate a balanced collection with descriptions; premium privacy features and link treatment may differ by plan. | 2026-08-03 | Open Pearltrees submit page (new tab)Pearltrees details |
| 669 | 66 | Phrack Magazine | 65 | Link type unknown | phrack.org | Publishing platforms | Free | Moderate | Medium | Live, conditional | Submit only original, deep security research or a durable technical guide with reproducible evidence; your tool may be mentioned solely as the research implementation when material. | Very high technical and originality bar; the checked CFP asks for 7-bit ASCII wrapped to 76 columns or UTF-8 Markdown and an ANTISPAM subject marker. Generic tutorials and marketing are not appropriate. | 2026-08-03 | Open Phrack Magazine submit page (new tab)Phrack Magazine details |
| 670 | 66 | PKP Plugin Gallery | 75 | Link type unknown | pkp.sfu.ca | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Develop 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. | 2026-08-05 | Open PKP Plugin Gallery submit page (new tab)PKP Plugin Gallery details |
| 671 | 66 | Planet PostgreSQL | 85 | Sometimes dofollow | postgresql.org | Publishing platforms | Free | Moderate | Medium | Needs checking | If you blog about PostgreSQL, register your feed so your Postgres posts are syndicated on the planet. | Only PostgreSQL-related posts are allowed and feeds that push commercial spam are removed. | Added 2026-11-01 | Open Planet PostgreSQL submit page (new tab)Planet PostgreSQL details |
| 672 | 66 | Planet Python | 60 | Sometimes dofollow | planetpython.org | Publishing platforms | Free | Moderate | Medium | Needs checking | Ask to have your Python-tagged blog feed added so your Python posts appear on the aggregator. | Your feed should contain only Python-related posts. | Added 2026-11-01 | Open Planet Python submit page (new tab)Planet Python details |
| 673 | 66 | Plunker | 70 | Nofollow | plnkr.co | Design galleries | Free | Moderate | Medium | Verified live | Build 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 2026-08-07 | Open Plunker submit page (new tab)Plunker details |
| 674 | 66 | Product Coalition | 55 | Nofollow | productcoalition.com | Guest posting sites | Free | Moderate | Medium | Needs checking | Join the community and submit product management articles to the publication on Medium. | Stories must share real product lessons; sales content is declined and links are generally nofollow. | Added 2026-11-01 | Open Product Coalition submit page (new tab)Product Coalition details |
| 675 | 66 | ProjectDiscovery Nuclei Templates | 60 | Link type unknown | projectdiscovery.io | Review platforms | Free | Moderate | Medium | Verified live | Create high-confidence defensive templates for authorized checks of privacy leaks or misconfigurations, include safe matchers and test evidence, then submit them for review. | Authorized defensive use only; avoid intrusive actions, require reproducible evidence, minimize false positives, follow severity and metadata rules, and provide safe testing. | Official Nuclei template creation guide and contribution repository checked 2026-08-05 | Open ProjectDiscovery Nuclei Templates submit page (new tab)ProjectDiscovery Nuclei Templates details |
| 676 | 66 | Prometheus Exporters and Integrations | 80 | Link type unknown | prometheus.io | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Create a maintained your tool exporter or native Prometheus metrics integration and submit it to the official exporters list. | Must expose genuinely useful metrics, follow exporter guidelines, avoid duplicate or vanity integrations, announce to the community, and pass docs review. | 2026-08-05 — https://prometheus.io/docs/instrumenting/writing_exporters/ | Open Prometheus Exporters and Integrations submit page (new tab)Prometheus Exporters and Integrations details |
| 677 | 66 | Publish0x | 60 | Nofollow | publish0x.com | Publishing platforms | Free | Moderate | Medium | Verified live | Apply as an author and publish original privacy, security or accessibility articles with contextual your tool references. | Own the content, prove authorship if asked, use relevant tags and never self-promote in other authors' comments. | 2026-08-05 | Open Publish0x submit page (new tab)Publish0x details |
| 678 | 66 | Pulumi Registry | 75 | Link type unknown | pulumi.com | Developer registries | Free | Moderate | Medium | Live, conditional | Publish a real multi-language Pulumi provider or component for deploying or configuring your tool, with binaries, SDK packages, schema, documentation, examples, tests, and a registry pull request. | Public Registry packages require a genuine executable package, public source, versioned binaries, SDK distribution, schema and complete docs. Pulumi reviews the registry PR; package names must be unique and releases must remain maintained. Do not build this solely for a backlink. | 2026-08-03 | Open Pulumi Registry submit page (new tab)Pulumi Registry details |
| 679 | 66 | Puppet Forge | 85 | Link type unknown | puppet.com | Developer registries | Free | Moderate | Medium | Not submitted | Build and test a Puppet module for supported your tool setup or security policy, complete metadata.json, package it, and publish through a Forge account. | Requires a genuine compatible module and valid metadata; Forge quality scoring, moderation, and outbound-link attributes are outside AltFTool's control. | 2026-08-03 | Open Puppet Forge submit page (new tab)Puppet Forge details |
| 680 | 66 | 95 | Nofollow | reddit.com | Communities and forums | Free | Moderate | Medium | Not submitted | Post to relevant subs with context: SideProject, SaaS, webdev. | Respect subreddit rules; 90/10 self-promo; no spam/comments. | 2026-07-30 | Open Reddit submit page (new tab)Reddit details | |
| 681 | 66 | ReliefWeb | 85 | Link type unknown | reliefweb.int | Other opportunities | Free | Moderate | Medium | Verified live | After your tool has eligible ReliefWeb content, request publishing access and submit humanitarian reports or training from verified owned URLs. | Only listed organizations with existing reports/jobs/trainings may use publishing access; trusted source URLs, taxonomy and editor review apply. | 2026-08-05 — https://apidoc.reliefweb.int/publishing | Open ReliefWeb submit page (new tab)ReliefWeb details |
| 682 | 66 | RenkuLab | 40 | Link type unknown | renkulab.io | Other opportunities | Free | Moderate | Medium | Verified live | Create a reproducible your tool evaluation project with code, data connectors, environment, narrative, and a public session launcher. | Publish a genuine research project, protect credentials and sensitive data, document reproducibility, and set visibility to Public. | 2026-08-05 — https://docs.renkulab.io/en/2.19.0/docs/users/use-cases/showcase-your-project-on-renku/ | Open RenkuLab submit page (new tab)RenkuLab details |
| 683 | 66 | Samsung Galaxy Store | 90 | Nofollow | developer.samsung.com | Marketplaces and app stores | Free | Moderate | Medium | Live, conditional | Distribute an your tool Android or Galaxy app and add its official website and support information. | Requires Samsung account, Seller Portal registration, commercial seller status and Galaxy Store review. | https://developer.samsung.com/galaxy-store/prepare.html | Open Samsung Galaxy Store submit page (new tab)Samsung Galaxy Store details |
| 684 | 66 | Sandstorm App Market | 55 | Link type unknown | apps.sandstorm.io | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Adapt a privacy-first your tool web utility to Sandstorm's grain model, package and sign the SPK, add complete metadata and tests, then publish it for review. | Must fit Sandstorm's isolated grain model, control signing keys, provide accurate identity, website, source, license, screenshots, and pass market review. | Official live Sandstorm market and publishing guide checked 2026-08-05 | Open Sandstorm App Market submit page (new tab)Sandstorm App Market details |
| 685 | 66 | Savannah Non-GNU | 70 | Link type unknown | nongnu.org | Software directories | Free | Moderate | Medium | Not submitted | Submit only a substantive free-software your tool component that runs primarily on free systems and needs authentic Savannah project hosting and collaboration. | Strict hosting-policy and licensing review applies; this is not a backlink directory, empty mirror, or marketing page, and unsuitable projects should not apply. | 2026-08-03 | Open Savannah Non-GNU submit page (new tab)Savannah Non-GNU details |
| 686 | 66 | Scribd | 95 | Nofollow | scribd.com | Publishing platforms | Free | Moderate | Medium | Verified live | Upload an original research-backed your tool guide and reference relevant tools naturally in the document. | Title and description are required; respect uploader rules and publish owned, substantive material only. | 2026-08-04 | Open Scribd submit page (new tab)Scribd details |
| 687 | 66 | SigmaHQ Rules | 45 | Link type unknown | sigmahq.io | Review platforms | Free | Moderate | Medium | Verified live | Create generic defensive Sigma rules for privacy-leak, credential-exposure, or scam-related log patterns, validate them, cite legitimate references, and submit a PR. | Rules need unique IDs, accurate log sources, low false-positive logic, valid references, tests and conventions; no offensive payloads or unverified claims. | Official Sigma rule repository, contribution guide, and 2025 rule guide checked 2026-08-05 | Open SigmaHQ Rules submit page (new tab)SigmaHQ Rules details |
| 688 | 66 | Slashdot | 90 | Nofollow | slashdot.org | Profiles and entities | Free | Moderate | Medium | Not submitted | Create 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. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/slashdot | Open Slashdot submit page (new tab)Slashdot details |
| 689 | 66 | SMath Extensions Manager | 40 | Link type unknown | smath.info | Marketplaces and app stores | Free | Moderate | Medium | Verified live | Build a genuine SMath plugin or reusable worksheet resource and register it for the public Extensions Manager gallery. | Requires a supported extension type, upload through the registered-user form, useful working content and SMath support-team approval. | 2026-08-05 — https://wiki.smath.com/en-US/Extensions_Manager | Open SMath Extensions Manager submit page (new tab)SMath Extensions Manager details |
| 690 | 66 | SnapFiles | 65 | Link type unknown | snapfiles.com | Software directories | Free | Moderate | Medium | Needs checking | Submit freeware or shareware for Windows via their author submission page. | Programs are tested; anything with adware or malware is declined. | Added 2026-11-01 | Open SnapFiles submit page (new tab)SnapFiles details |
| 691 | 66 | Spiceworks Community | 85 | Nofollow | spiceworks.com | Profiles and entities | Free | Moderate | Medium | Verified live | Join with a transparent identity and answer relevant IT/privacy questions from direct experience; mention an your tool resource only when it materially completes a specific answer. | The community explicitly bans spam and promotional participation; only labeled Brand Representatives may promote products/services. Ordinary participation must be helpful and non-promotional, with affiliation disclosed before any contextual mention. Posts are public UGC and search-indexed, but moderation, deletion, and nofollow/rel treatment are at platform discretion. | 2026-08-03 | Open Spiceworks Community submit page (new tab)Spiceworks Community details |
| 692 | 66 | Spiceworks Community | 80 | Nofollow | community.spiceworks.com | Communities and forums | Free | Moderate | Medium | Needs checking | A good fit for IT and admin tools: answer IT pro questions and fill in your vendor or personal profile. | Vendors must disclose themselves; sales pitches are not welcome. | Added 2026-11-01 | Open Spiceworks Community submit page (new tab)Spiceworks Community details |
| 693 | 66 | SSRN | 90 | Link type unknown | ssrn.com | Publishing platforms | Free | Moderate | Medium | Live, conditional | Create a truthful author account and submit a substantive your tool privacy, security or accessibility working paper with legitimate citations. | Scholarly work only; accurate authors and affiliations, English title/abstract, PDF, copyright permission and applicable ethics/privacy rules are required. | 2026-08-04 | Open SSRN submit page (new tab)SSRN details |
| 694 | 66 | Startempire Wire | 30 | Link type unknown | startempirewire.com | Startup directories | Free | Moderate | Medium | Verified live | Create an account and submit your tool for a dedicated startup profile and category placement. | Use accurate company and traction data; directory review applies. | 2026-08-03 | Open Startempire Wire submit page (new tab)Startempire Wire details |
| 695 | 66 | StartupBase | 45 | Link type unknown | startupbase.io | Startup directories | Free | Moderate | Medium | Needs checking | Create startup profile linking canonical homepage. | Verify if submissions still open before spending time. | 2026-07-30 | Open StartupBase submit page (new tab)StartupBase details |
| 696 | 66 | switching.software | 50 | Link type unknown | switching.software | Software directories | Free | Moderate | Medium | Verified live | Suggest one mature your tool utility through the official Codeberg issue path only if it is an easy-to-use, privacy-respecting replacement for a clearly identified invasive service. | The project must be meaningfully more privacy-conscious and ethical while remaining usable by nontechnical people; many listed alternatives are free/open source. Community review applies and inclusion is not guaranteed. | 2026-08-03 | Open switching.software submit page (new tab)switching.software details |
| 697 | 66 | Symbaloo | 80 | Nofollow | symbaloo.com | Publishing platforms | Free | Moderate | Medium | Not submitted | Publish a public Webmix of trustworthy privacy resources with clearly labeled your tool tiles among independent sources. | Set the Webmix public, organize it for users, and avoid keyword-stuffed or AltFTool-only link grids. | 2026-08-03 | Open Symbaloo submit page (new tab)Symbaloo details |
| 698 | 66 | Teach Access | 50 | Link type unknown | teachaccess.org | Software directories | Free | Moderate | Medium | Verified live | Contribute a substantive accessibility role template, translation or toolkit improvement with useful source attribution. | Must fit the toolkit’s structure and open-source purpose; contextual attribution only, not a promotional entry. | 2026-08-05 — https://www.teachaccess.org/resources/accessibility-skills-hiring-toolkit/ | Open Teach Access submit page (new tab)Teach Access details |
| 699 | 66 | TechSpot Downloads | 90 | Nofollow | techspot.com | Software directories | Free | Moderate | Medium | Needs checking | Ask the TechSpot team to add your app to the downloads section, with version notes. | Editorial picks only; they favour well-known or genuinely useful tools. | Added 2026-11-01 | Open TechSpot Downloads submit page (new tab)TechSpot Downloads details |
| 700 | 66 | Telegraph | 85 | Nofollow | telegra.ph | Profiles and entities | Free | Moderate | Medium | Verified live | Create 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. Dofollow is reported but recheck after approval. | 2026-07-30 • https://www.submission.directory/site/telegraph | Open Telegraph submit page (new tab)Telegraph details |
Four steps that work for a new site, a SaaS or a side project. No paid link packages, nothing that risks a penalty.
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.
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.
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.
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
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 viewAn 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.
One-shot launches where timing and preparation decide the outcome.
Publications that accept contributed articles. Slow and editorial, but the links are earned.
Fast-growing listings specifically for AI-powered tools.
Extension, plugin and integration stores. Real review processes, real distribution.
Startup listings, beta lists and founder media.
General tool and software catalogues with real search traffic.
B2B review sites. Slow to approve, strong once live.
Package, image and docs hosting that carries real authority.
Showcases judged on craft. A good screenshot matters more than copy.
Write once, link back. Editorial standards vary widely.
Get quoted or distribute a release. Slower, higher ceiling.
Company and local listings. Unglamorous, consistently indexed.
Owned pages you control: company, founder, knowledge-panel entities.
Answer real questions. Never drop a bare link.
Brand surface and referral traffic more than link equity.
Everything that does not fit the buckets above.