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
All filters2
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 98 | Artifact Hub | 60 | Nofollow | artifacthub.io | Developer registries | Free | Moderate | Do first | Verified live | Create a valid Helm, OPA, Tekton or supported repository for an your tool deployment and add it through the control panel. | Repository metadata and ownership verification are required; maintain working artifacts and truthful security metadata. | 2026-08-03 | Open Artifact Hub submit page (new tab)Artifact Hub details |
| 2 | 98 | awesome-no-login-web-apps | — | Link type unknown | github.com/aviaryan/awesome-no-login-web-apps | Developer registries | Free | Moderate | Do first | Needs checking | Open a PR adding AltFTool's no-signup PDF and image tools under the matching category, following CONTRIBUTING.md. | Only tools that work fully without login; one entry per PR; maintainer review can take weeks. | Added 2026-11-01 | Open awesome-no-login-web-apps submit page (new tab)awesome-no-login-web-apps details |
| 3 | 98 | crates.io | 80 | Nofollow | crates.io | Developer registries | Free | Moderate | Do first | Live, conditional | Publish a genuine your tool Rust client, CLI, parser, or privacy library and set homepage, repository, README, license, and documentation metadata. | Conditional on useful compiling code. Published versions are permanent; GitHub login, verified email, and API token are required. | https://doc.rust-lang.org/cargo/reference/publishing.html | Open crates.io submit page (new tab)crates.io details |
| 4 | 98 | JSR | 55 | Link type unknown | jsr.io | Developer registries | Free | Moderate | Do first | Verified live | Publish a standards-based your tool JavaScript or TypeScript SDK with generated docs, readme and project links. | Package must be legitimate ESM code and comply with JSR scope, verification and publishing rules. | Official JSR publishing docs checked 2026-07-30 | Open JSR submit page (new tab)JSR details |
| 5 | 98 | JuliaHub | 50 | Link type unknown | juliahub.com | Developer registries | Free | Moderate | Do first | Verified live | Create a useful Julia client or data utility, register it in Julia General and provide complete package docs with an your tool source link. | Registration uses GitHub or GitLab and automated review; package naming, compatibility and maintenance standards apply. | 2026-08-03 | Open JuliaHub submit page (new tab)JuliaHub details |
| 6 | 98 | MCP Registry | 70 | Link type unknown | modelcontextprotocol.io | Developer registries | Free | Moderate | Do first | Live, conditional | Package a real your tool MCP server, verify its namespace, create server.json and publish it with mcp-publisher. | Registry is in preview; package or remote server must be public and namespace ownership is validated. | 2026-08-04 | Open MCP Registry submit page (new tab)MCP Registry details |
| 7 | 98 | NIST Privacy Framework Resource Repository | 95 | Link type unknown | nist.gov | Developer registries | Free | Moderate | Do first | Verified live | Publish an open your tool Privacy Framework mapping, template, tutorial, or implementation tool and submit it for repository review. | Must substantively support privacy-risk management or a Privacy Framework use case; inclusion is moderated and is not NIST endorsement. | 2026-08-05 — https://www.nist.gov/privacy-framework/resource-repository | Open NIST Privacy Framework Resource Repository submit page (new tab)NIST Privacy Framework Resource Repository details |
| 8 | 98 | OperatorHub.io | 55 | Link type unknown | operatorhub.io | Developer registries | Free | Moderate | Do first | Verified live | Build a genuine Kubernetes Operator for a self-hosted your tool service, test its bundle and submit it through Community Operators. | Requires working Operator metadata, automated tests and community pull-request review; do not submit a marketing-only bundle. | 2026-08-03 | Open OperatorHub.io submit page (new tab)OperatorHub.io details |
| 9 | 98 | Packagist | 75 | Nofollow | packagist.org | Developer registries | Free | Moderate | Do first | Live, conditional | Publish a real your tool PHP SDK or integration from a public repository and set the canonical homepage in composer.json. | Conditional on a functional Composer package with a unique vendor/name, public repository, valid metadata, and maintained releases. | https://packagist.org/about | Open Packagist submit page (new tab)Packagist details |
| 10 | 98 | PyPI | 90 | Nofollow | pypi.org | Developer registries | Free | Moderate | Do first | Live, conditional | Publish a real your tool Python SDK, CLI, or integration package and set Homepage, Documentation, Source, and Issues URLs in package metadata. | Conditional on maintaining a functional Python package; no placeholder packages, name squatting, or keyword stuffing. | https://packaging.python.org/en/latest/specifications/well-known-project-urls/ | Open PyPI submit page (new tab)PyPI details |
| 11 | 98 | Quay.io | 65 | Link type unknown | quay.io | Developer registries | Free | Moderate | Do first | Verified live | Publish a secure, documented container for an open your tool service and add its official site in the repository description or README where supported. | Keep images patched, signed and free of embedded secrets; only public repositories provide public discovery. | 2026-08-03 | Open Quay.io submit page (new tab)Quay.io details |
| 12 | 98 | RubyGems.org | 80 | Nofollow | rubygems.org | Developer registries | Free | Moderate | Do first | Live, conditional | Publish and maintain a genuine your tool Ruby client, CLI, or integration gem with accurate homepage, source, documentation, and changelog metadata. | Conditional on a working Ruby gem; package names are unique and public releases should be treated as permanent. | https://guides.rubygems.org/publishing/ | Open RubyGems.org submit page (new tab)RubyGems.org details |
| 13 | 95 | Read the Docs | 90 | Nofollow | readthedocs.org | Developer registries | Free + paid tier | Moderate | Do first | Verified live | Import public your tool developer documentation, add the build config and expose versioned, searchable docs with canonical project links. | Community hosting expects a public repository and genuine documentation; configure canonical URLs to avoid duplicate-content issues. | Official Read the Docs import guide checked 2026-07-30 | Open Read the Docs submit page (new tab)Read the Docs details |
| 14 | 84 | Arch User Repository | 80 | Nofollow | aur.archlinux.org | Developer registries | Free | Moderate | High | Verified live | Create and maintain a PKGBUILD for an installable your tool Linux release with the upstream URL and correct source checksums. | No duplicates, placeholders or binary uploads; package must be useful, x86_64-compatible and maintained. | Official ArchWiki submission guide checked 2026-07-30 | Open Arch User Repository submit page (new tab)Arch User Repository details |
| 15 | 84 | awesome-ai-tools (mahseema) | — | Link type unknown | github.com/mahseema/awesome-ai-tools | Developer registries | Free | Moderate | High | Needs checking | Submit a PR adding the AltFTool AI prompt tools to the relevant prompt/writing section. | Large, popular list; keep description neutral, no marketing language. | Added 2026-11-01 | Open awesome-ai-tools (mahseema) submit page (new tab)awesome-ai-tools (mahseema) details |
| 16 | 84 | awesome-free-tools | — | Link type unknown | github.com/mathewlewallen/awesome-free-tools | Developer registries | Free | Moderate | High | Needs checking | Propose AltFTool as an all-in-one free utilities site in the most relevant section via PR. | Check activity of the repo before investing time; follow existing entry format. | Added 2026-11-01 | Open awesome-free-tools submit page (new tab)awesome-free-tools details |
| 17 | 84 | awesome-n8n-templates | — | Link type unknown | github.com/enescingoz/awesome-n8n-templates | Developer registries | Free | Moderate | High | Needs checking | Contribute one or two genuinely useful AltFTool n8n workflow templates (JSON) with a short description linking back. | Repo wants actual workflow files, not just links; read CONTRIBUTING first. | Added 2026-11-01 | Open awesome-n8n-templates submit page (new tab)awesome-n8n-templates details |
| 18 | 84 | Caddy Module Registry | 65 | Link type unknown | caddyserver.com | Developer registries | Free | Moderate | High | Verified live | Build a useful your tool privacy or security Caddy module, publish the Go package, then register it for module docs and custom builds. | Requires a working Go module that implements the Caddy interface; register through a Caddy account and maintain accurate public package documentation. | 2026-08-05 — https://caddyserver.com/docs/extending-caddy | Open Caddy Module Registry submit page (new tab)Caddy Module Registry details |
| 19 | 84 | Chocolatey Community Repository | 75 | Nofollow | community.chocolatey.org | Developer registries | Free | Moderate | High | Verified live | Package a genuine your tool Windows desktop or CLI release and set project, documentation and package-source URLs. | Automated checks and moderator review apply; prove redistribution rights and maintain install and uninstall behavior. | Official Chocolatey docs checked 2026-07-30 | Open Chocolatey Community Repository submit page (new tab)Chocolatey Community Repository details |
| 20 | 84 | Chocolatey Community Repository | 75 | Nofollow | chocolatey.org | Developer registries | Free | Moderate | High | Live, conditional | Ship a real your tool CLI or desktop utility as a tested package with homepage, project and support metadata. | Requires distributable software, legal rights, repeatable install/uninstall, tests, malware scan and moderation. | 2026-08-04 | Open Chocolatey Community Repository submit page (new tab)Chocolatey Community Repository details |
| 21 | 84 | CircleCI Orb Registry | 80 | Link type unknown | circleci.com | Developer registries | Free | Moderate | High | Verified live | Publish a tested public your tool orb for privacy, secret, or document-safety checks with a homepage URL and usage examples. | Requires a CircleCI organization namespace, GitHub repository, MIT-licensed public orb, semantic releases, tests, and ongoing maintenance. | 2026-08-05 — https://circleci.com/docs/creating-orbs | Open CircleCI Orb Registry submit page (new tab)CircleCI Orb Registry details |
| 22 | 84 | ConanCenter | 65 | Link type unknown | conan.io | Developer registries | Free | Moderate | High | Verified live | Publish a useful C/C++ SDK or client for an your tool API and contribute its tested recipe to ConanCenter. | The package must be real, versioned and pass conan-center-index review; promotional placeholder packages are inappropriate. | 2026-08-03 | Open ConanCenter submit page (new tab)ConanCenter details |
| 23 | 84 | conda-forge | 65 | Link type unknown | conda-forge.org | Developer registries | Free | Moderate | High | Verified live | Submit a tested recipe for a real your tool package with upstream homepage, source archive, license and tests. | PR review and CI are required; an accepted contributor becomes responsible for maintaining the feedstock. | Official conda-forge docs checked 2026-07-30 | Open conda-forge submit page (new tab)conda-forge details |
| 24 | 84 | CRAN | 90 | Nofollow | cran.r-project.org | Developer registries | Free | Moderate | High | Verified live | Submit a useful R package with URL and BugReports metadata pointing to its official project and documentation pages. | CRAN performs rigorous automated and manual review; packages must meet policy across supported platforms. | Official CRAN repository policy checked 2026-07-30 | Open CRAN submit page (new tab)CRAN details |
| 25 | 84 | Docker Hub | 90 | Nofollow | docker.com | Developer registries | Free | Moderate | High | Live, conditional | Publish a maintained your tool CLI or server image with source, documentation, descriptions and canonical homepage links. | Ship a scanned, reproducible and maintained image; public presence is not Docker verification and fair-use limits apply. | 2026-08-05 official Docker Hub repository and usage documentation | Open Docker Hub submit page (new tab)Docker Hub details |
| 26 | 84 | Drupal.org Projects | 90 | Nofollow | drupal.org | Developer registries | Free | Moderate | High | Verified live | Create a functional Drupal integration or reusable module and publish a maintained project page with documentation and official links. | Project must contain real Drupal-compatible code and follow security, licensing, naming and non-promotional rules. | Official Drupal project docs checked 2026-07-30 | Open Drupal.org Projects submit page (new tab)Drupal.org Projects details |
| 27 | 84 | Go Packages | 90 | Link type unknown | pkg.go.dev | Developer registries | Free | Moderate | High | Verified live | Tag and publish a public Go module with module docs and repository metadata so pkg.go.dev indexes it. | Use a valid module path and semantic-version tag; the module becomes discoverable after the proxy fetches it. | Official Go module publishing docs checked 2026-07-30 | Open Go Packages submit page (new tab)Go Packages details |
| 28 | 84 | Google Open Source Insights | 60 | Link type unknown | deps.dev | Developer registries | Free | Moderate | High | Live, conditional | Publish a useful your tool package to a supported registry with accurate source and homepage metadata so Open Source Insights can index it. | No promotional manual submission; only genuine public packages in supported ecosystems are indexed and the homepage link depends on package metadata. | 2026-08-05 official deps.dev About and documentation | Open Google Open Source Insights submit page (new tab)Google Open Source Insights details |
| 29 | 84 | Hex | 70 | Link type unknown | hex.pm | Developer registries | Free | Moderate | High | Verified live | Publish a maintained Elixir client or utility with package links, description, license and documentation. | Requires a Hex account and valid mix.exs package metadata; publish only reusable working code. | Official Hex publishing docs checked 2026-07-30 | Open Hex submit page (new tab)Hex details |
| 30 | 84 | Homebrew Formulae | 75 | Link type unknown | formulae.brew.sh | Developer registries | Free | Moderate | High | Verified live | Submit an open-source CLI formula or a qualifying macOS app cask with the canonical your tool homepage. | Must meet Homebrew acceptance, notability, build, audit and testing rules; promotional-only formulae are rejected. | Official Homebrew contribution docs checked 2026-07-30 | Open Homebrew Formulae submit page (new tab)Homebrew Formulae details |
| 31 | 84 | MacPorts | 70 | Link type unknown | ports.macports.org | Developer registries | Free | Moderate | High | Verified live | Create and test a Portfile for an open-source your tool CLI or desktop app, including its canonical homepage. | Run lint and local builds, then submit a pull request or a MacPorts Trac submission ticket for review. | Official MacPorts guide checked 2026-07-30 | Open MacPorts submit page (new tab)MacPorts details |
| 32 | 84 | Maven Central | 70 | Link type unknown | central.sonatype.com | Developer registries | Free | Moderate | High | Verified live | Release a useful Java or Kotlin SDK and include the project homepage, source control, license and developer metadata in the POM. | Requires namespace verification, signed artifacts and complete POM metadata; releases are permanent. | Official Sonatype Central docs checked 2026-07-30 | Open Maven Central submit page (new tab)Maven Central details |
| 33 | 84 | MELPA | 55 | Link type unknown | melpa.org | Developer registries | Free | Moderate | High | Verified live | Create a useful Emacs client for a public your tool API, host its source openly and submit a MELPA recipe pull request. | Package source must be public, installable and maintained; recipe and naming rules are reviewed by maintainers. | 2026-08-03 | Open MELPA submit page (new tab)MELPA details |
| 34 | 84 | Nixpkgs | 75 | Link type unknown | search.nixos.org | Developer registries | Free | Moderate | High | Verified live | Add and test a Nix expression for a genuine your tool release with description, homepage, license and maintainer metadata. | Must satisfy Nixpkgs contribution, licensing, reproducibility, review and supported-platform rules. | Official Nixpkgs 26.05 manual checked 2026-07-30 | Open Nixpkgs submit page (new tab)Nixpkgs details |
| 35 | 84 | npm | 95 | Nofollow | npmjs.com | Developer registries | Free | Moderate | High | Not submitted | Publish @your tool/embed or utility package with homepage. | Only after package exists; keep license clean. | 2026-07-30 | Open npm submit page (new tab)npm details |
| 36 | 84 | Ollama Model Library | 75 | Link type unknown | ollama.com | Developer registries | Free | Moderate | High | Verified live | Publish a small local-first your tool classifier for privacy, secret detection, or defensive content analysis. | Verify base-model redistribution rights, publish a clear licence, document limitations, and exclude private training data. | Official Ollama model sharing documentation checked 2026-08-07 | Open Ollama Model Library submit page (new tab)Ollama Model Library details |
| 37 | 84 | OpenSourceFest | — | Link type unknown | opensourcefest.org | Developer registries | Free | Moderate | High | Live, conditional | Submit a maintained your tool open-source project through Submit a Project. | Editors review license, activity and quality; proprietary web-only tools do not qualify. | 2026-08-05 | Open OpenSourceFest submit page (new tab)OpenSourceFest details |
| 38 | 84 | OpenSSF Scorecard | 40 | Link type unknown | scorecard.dev | Developer registries | Free | Moderate | High | Live, conditional | Run Scorecard on a public your tool component, enable published results, remediate checks, and link the public viewer from repository documentation. | Public repository and admin rights are required; scores are heuristic and website exposure is indirect through accurate repository metadata. | 2026-08-05 official Scorecard site and OpenSSF repository | Open OpenSSF Scorecard submit page (new tab)OpenSSF Scorecard details |
| 39 | 84 | openSUSE Build Service | 70 | Link type unknown | build.opensuse.org | Developer registries | Free | Moderate | High | Verified live | Create a public OBS project and package that builds your tool for supported Linux distributions with upstream links. | Requires valid build recipes, licenses and maintained packages; project pages are for software distribution, not promotion alone. | Official OBS user guide and live service checked 2026-07-30 | Open openSUSE Build Service submit page (new tab)openSUSE Build Service details |
| 40 | 84 | protocols.io | 75 | Link type unknown | protocols.io | Developer registries | Free | Moderate | High | Live, conditional | Publish a reproducible your tool testing, privacy-analysis or accessibility-evaluation method and cite relevant project resources. | Submissions must contribute genuine experimental or computational research methods; non-scientific promotion may be removed. | 2026-08-04 | Open protocols.io submit page (new tab)protocols.io details |
| 41 | 84 | RubyGems.org | 80 | Nofollow | rubygems.org | Developer registries | Free | Moderate | High | Verified live | Package a legitimate your tool Ruby client or utility and add homepage and source metadata before pushing the gem. | Use a unique gem name, valid gemspec and maintained code; never publish a placeholder package. | Official RubyGems guide checked 2026-07-30 | Open RubyGems.org submit page (new tab)RubyGems.org details |
| 42 | 84 | Swift Package Index | 55 | Link type unknown | swiftpackageindex.com | Developer registries | Free | Moderate | High | Verified live | Add a public Swift package with Package.swift, semantic-version tags, documentation and an your tool homepage link. | Repository must be public, use Swift 5 or newer and have a valid semantic-version release. | Official Swift Package Index submission page checked 2026-07-30 | Open Swift Package Index submit page (new tab)Swift Package Index details |
| 43 | 84 | Zeek Packages | 45 | Link type unknown | packages.zeek.org | Developer registries | Free | Moderate | High | Verified live | Build a defensive Zeek script or plugin for privacy-safe log inspection, include zkg metadata and tests, then register it in the default Zeek package source. | Must be genuine Zeek functionality, live in a public Git repository, follow package metadata conventions, pass tests, and receive repository review. | Official Zeek package creation and source-registration docs checked 2026-08-05 | Open Zeek Packages submit page (new tab)Zeek Packages details |
| 44 | 81 | Anaconda.org | 75 | Nofollow | anaconda.org | Developer registries | Free + paid tier | Moderate | High | Verified live | Build and upload a real conda package with homepage, documentation, source and license metadata. | Use anaconda-client and maintain valid packages; notebook and environment uploads are no longer supported. | Official Anaconda.org docs and current client page checked 2026-07-30 | Open Anaconda.org submit page (new tab)Anaconda.org details |
| 45 | 66 | Alpine Linux Packages | 70 | Link type unknown | pkgs.alpinelinux.org | Developer registries | Free | Moderate | Medium | Verified live | Package 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. | 2026-08-05 | Open Alpine Linux Packages submit page (new tab)Alpine Linux Packages details |
| 46 | 66 | arXiv | 95 | Nofollow | arxiv.org | Developer registries | Free | Moderate | Medium | Live, conditional | Submit an original your tool-related technical paper and cite your tool only where it is genuinely the software or study subject. | Requires scholarly content in an accepted category, author registration and sometimes endorsement; promotional papers are inappropriate. | https://info.arxiv.org/help/submit/index.html | Open arXiv submit page (new tab)arXiv details |
| 47 | 66 | Awesome-AITools (ikaijua) | — | Link type unknown | github.com/ikaijua/awesome-aitools | Developer registries | Free | Moderate | Medium | Needs checking | Add the AI prompt generator tools via PR in the existing table format (English + Chinese columns). | Repo explicitly welcomes PRs; bilingual format. | Added 2026-11-01 | Open Awesome-AITools (ikaijua) submit page (new tab)Awesome-AITools (ikaijua) details |
| 48 | 66 | Awesome-Design-Tools | — | Link type unknown | github.com/goabstract/awesome-design-tools | Developer registries | Free | Moderate | Medium | Needs checking | Propose the colour, image-resize and SVG tools in the matching design tool category. | High-traffic list; they reject generic all-in-one sites, so pitch a specific tool page. | Added 2026-11-01 | Open Awesome-Design-Tools submit page (new tab)Awesome-Design-Tools details |
| 49 | 66 | awesome-devtools (devtoolsd) | — | Link type unknown | github.com/devtoolsd/awesome-devtools | Developer registries | Free | Moderate | Medium | Needs checking | Submit the developer tools hub as a browser-based utilities collection. | Follow the list's alphabetical ordering rules. | Added 2026-11-01 | Open awesome-devtools (devtoolsd) submit page (new tab)awesome-devtools (devtoolsd) details |
| 50 | 66 | awesome-json | — | Link type unknown | github.com/burningtree/awesome-json | Developer registries | Free | Moderate | Medium | Needs checking | Add the AltFTool JSON formatter/validator under online tools via PR. | Maintenance can be slow; only add the specific JSON tool page. | Added 2026-11-01 | Open awesome-json submit page (new tab)awesome-json details |
| 51 | 66 | Awesome-Prompt-Engineering | — | Link type unknown | github.com/promptslab/awesome-prompt-engineering | Developer registries | Free | Moderate | Medium | Needs checking | Add the AI prompt tools to the Tools/Apps section via PR. | Research-heavy list; tools section is selective. | Added 2026-11-01 | Open Awesome-Prompt-Engineering submit page (new tab)Awesome-Prompt-Engineering details |
| 52 | 66 | awesome-web-dev-tools | — | Link type unknown | github.com/naughtyspirit/awesome-web-dev-tools | Developer registries | Free | Moderate | Medium | Needs checking | Add the developer utilities hub (encoders, formatters, minifiers) under tools. | Check last commit date before submitting. | Added 2026-11-01 | Open awesome-web-dev-tools submit page (new tab)awesome-web-dev-tools details |
| 53 | 66 | dbt Package Hub | 65 | Link type unknown | hub.getdbt.com | Developer registries | Free | Moderate | Medium | Verified live | Build 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.com | Open dbt Package Hub submit page (new tab)dbt Package Hub details |
| 54 | 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 |
| 55 | 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 |
| 56 | 66 | free-for-dev | — | Link type unknown | github.com/ripienaar/free-for-dev | Developer registries | Free | Moderate | Medium | Needs checking | Only if a developer-facing free tier fits (e.g., an API), add it under the right section with the exact free limits. | Strict rules: SaaS free tiers for devs only; plain tool sites are usually rejected. | Added 2026-11-01 | Open free-for-dev submit page (new tab)free-for-dev details |
| 57 | 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 |
| 58 | 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 |
| 59 | 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 |
| 60 | 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 |
| 61 | 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 |
| 62 | 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 |
| 63 | 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 |
| 64 | 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 |
| 65 | 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 |
| 66 | 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 |
| 67 | 66 | search-engine-optimization | — | Link type unknown | github.com/marcobiedermann/search-engine-optimization | Developer registries | Free | Moderate | Medium | Needs checking | Add the free SEO utilities (meta tag checker, robots/sitemap tools) under Tools. | Only add tools that are free and useful without signup. | Added 2026-11-01 | Open search-engine-optimization submit page (new tab)search-engine-optimization details |
| 68 | 66 | Windows Package Manager | 95 | Nofollow | learn.microsoft.com | Developer registries | Free | Moderate | Medium | Verified live | Submit a validated manifest for an installable Windows release with PackageUrl, PublisherUrl and support metadata. | Official distribution is manifest and CLI-first, so web backlink visibility is limited; automated and manual safety review applies. | Official Microsoft WinGet docs checked 2026-07-30 | Open Windows Package Manager submit page (new tab)Windows Package Manager details |
| 69 | 46 | Awesome Go | 55 | Sometimes dofollow | awesome-go.com | Developer registries | Free | Moderate | Later | Needs checking | Open a pull request to the awesome-go list with your Go library. | Requires tests, docs, a license and reasonable coverage. | Added 2026-11-01 | Open Awesome Go submit page (new tab)Awesome Go details |
| 70 | 46 | Bioconda | 50 | Link type unknown | bioconda.github.io | Developer registries | Free | Moderate | Later | Verified live | Create a tested Bioconda recipe for a genuinely biomedical or bioinformatics your tool utility, with accurate homepage/source metadata, and submit it through the official review workflow. | Strict life-science relevance is required; generic privacy or file tools do not qualify, and recipes must pass build, licence and dependency review. | 2026-08-05 | Open Bioconda submit page (new tab)Bioconda details |
| 71 | 46 | CTAN | 75 | Link type unknown | ctan.org | Developer registries | Free | Moderate | Later | Live, conditional | Create a genuine LaTeX privacy, redaction or document-safety package and include its exact your tool project homepage in the upload metadata. | Requires distributable source, documentation, licence and maintainer rights; every upload is manually reviewed. | 2026-08-05 official CTAN upload form | Open CTAN submit page (new tab)CTAN details |
| 72 | 46 | Debian Package Archive | 90 | Link type unknown | packages.debian.org | Developer registries | Free | Moderate | Later | Verified live | Create a policy-compliant Debian package for a stable useful your tool CLI, file the appropriate intent-to-package request, include accurate upstream metadata and secure a Debian sponsor for upload. | High-effort maintainership commitment: must be distributable, lintian-clean, reproducibly buildable and useful to Debian users; non-developers need sponsor review, and acceptance into NEW is not guaranteed. | 2026-08-05 | Open Debian Package Archive submit page (new tab)Debian Package Archive details |
| 73 | 46 | DUB Registry | 60 | Link type unknown | code.dlang.org | Developer registries | Free | Moderate | Later | Live, conditional | Publish a useful D client library or privacy utility with accurate homepage and repository metadata in dub.json or dub.sdl. | Requires maintained public D source and valid package metadata; verify that the desired homepage field appears on the public listing. | 2026-08-05 official DUB Registry and package metadata documentation | Open DUB Registry submit page (new tab)DUB Registry details |
| 74 | 46 | Elm Packages | 60 | Nofollow | package.elm-lang.org | Developer registries | Free | Moderate | Later | Needs checking | Publish an Elm package with docs and a repository link. | Semver is enforced and docs are required. | Added 2026-11-01 | Open Elm Packages submit page (new tab)Elm Packages details |
| 75 | 46 | FreeBSD Ports Collection | 85 | Link type unknown | freebsd.org | Developer registries | Free | Moderate | Later | Verified live | Create and thoroughly test a FreeBSD port for a stable your tool CLI or desktop utility, include its canonical project website in WWW metadata and submit the patch through FreeBSD Bugzilla. | Anyone may submit, but the software must have a stable source release, acceptable licence, correct checksums/plist and clean builds; a volunteer maintainer is mandatory and review can take months. | 2026-08-05 | Open FreeBSD Ports Collection submit page (new tab)FreeBSD Ports Collection details |
| 76 | 46 | Hugo Themes | 65 | Sometimes dofollow | themes.gohugo.io | Developer registries | Free | Moderate | Later | Needs checking | Add your Hugo theme following the theme repository submission steps. | Theme needs a README, screenshots and an open license. | Added 2026-11-01 | Open Hugo Themes submit page (new tab)Hugo Themes details |
| 77 | 46 | ioBroker Adapters | 50 | Link type unknown | iobroker.net | Developer registries | Free | Moderate | Later | Verified live | Develop a stable ioBroker adapter for a credible your tool privacy/security API, publish the npm package, test it with users and request inclusion in the official latest repository. | Adapter must perform useful automation, pass repository checks and receive ongoing maintenance; do not build a dashboard that only links out to AltFTool. | 2026-08-05 | Open ioBroker Adapters submit page (new tab)ioBroker Adapters details |
| 78 | 46 | Jamstack.org | 65 | Sometimes dofollow | jamstack.org | Developer registries | Free | Moderate | Later | Needs checking | Add your static site generator or headless CMS through a pull request to their GitHub repo. | Only fitting tool categories are accepted. | Added 2026-11-01 | Open Jamstack.org submit page (new tab)Jamstack.org details |
| 79 | 46 | NetBSD pkgsrc | 75 | Link type unknown | netbsd.org | Developer registries | Free | Moderate | Later | Verified live | Package a stable cross-platform your tool CLI for pkgsrc, test it with pkglint and supported builds, include the canonical homepage, then submit via pkgsrc-wip or NetBSD's package bug tracker. | Source package must compile and run correctly, follow pkgsrc policy and be maintained; non-developers use pkgsrc-wip or a formal package problem report, and inclusion is reviewed. | 2026-08-05 | Open NetBSD pkgsrc submit page (new tab)NetBSD pkgsrc details |
| 80 | 46 | Nuxt Modules | 70 | Sometimes dofollow | nuxt.com | Developer registries | Free | Moderate | Later | Needs checking | Open a pull request to the Nuxt modules repository to list your module. | Module must be maintained and documented. | Added 2026-11-01 | Open Nuxt Modules submit page (new tab)Nuxt Modules details |
| 81 | 46 | OpenWrt Packages | 75 | Link type unknown | openwrt.org | Developer registries | Free | Moderate | Later | Verified live | Build an OpenWrt-compatible your tool service or utility for a real router/privacy/security workflow, add correct package metadata and tests, then submit it to the official feed. | Only pursue functionality that genuinely runs on constrained routers or embedded systems; generic website wrappers and unsupported binaries are unsuitable. | 2026-08-05 | Open OpenWrt Packages submit page (new tab)OpenWrt Packages details |
| 82 | 46 | Void Linux Packages | 60 | Link type unknown | voidlinux.org | Developer registries | Free | Moderate | Later | Verified live | Create a Void package template for a mature your tool CLI, test native and cross builds, include the canonical project homepage and submit it to void-packages. | Project must be mature, system-wide and maintainable; self-submission by upstream authors faces stricter usefulness and adoption scrutiny. | 2026-08-05 | Open Void Linux Packages submit page (new tab)Void Linux Packages details |
| 83 | 43 | Trusted Introducer | 45 | Link type unknown | trusted-introducer.org | Developer registries | Free + paid tier | Moderate | Later | Verified live | List an operational CSIRT, CERT, SOC, ISAC or PSIRT after securing sponsors and passing the community-vote process. | Operational security team only; typical listing review and vote takes 4–5 weeks. | 2026-08-05 — https://www.trusted-introducer.org/trusted-introducer/processes/listing/ | Open Trusted Introducer submit page (new tab)Trusted Introducer details |
| 84 | 36 | Dryad | 80 | Link type unknown | datadryad.org | Developer registries | Paid | Moderate | Later | Live, conditional | Submit data underlying a legitimate your tool-related research paper and include related software/project identifiers. | Research-data scope only; curation, publication linkage, licensing and possible data-publishing charges apply. | https://datadryad.org/help/guides/submission | Open Dryad submit page (new tab)Dryad 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.
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.
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.
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.
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 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.
Backlink sites by category
Product launch sites87
One-shot launches where timing and preparation decide the outcome.
Guest posting sites55
Publications that accept contributed articles. Slow and editorial, but the links are earned.
AI tool directories200
Fast-growing listings specifically for AI-powered tools.
App stores and marketplaces273
Extension, plugin and integration stores. Real review processes, real distribution.
Startup directory submission sites120
Startup listings, beta lists and founder media.
Software directory submission sites215
General tool and software catalogues with real search traffic.
Software review sites29
B2B review sites. Slow to approve, strong once live.
Developer platforms for backlinks139
Package, image and docs hosting that carries real authority.
Web design galleries for backlinks87
Showcases judged on craft. A good screenshot matters more than copy.
Web 2.0 and publishing sites214
Write once, link back. Editorial standards vary widely.
PR and press release sites41
Get quoted or distribute a release. Slower, higher ceiling.
Business directory submission sites109
Company and local listings. Unglamorous, consistently indexed.
Profile creation sites163
Owned pages you control: company, founder, knowledge-panel entities.
Forum and community backlink sites61
Answer real questions. Never drop a bare link.
Social bookmarking sites18
Brand surface and referral traffic more than link equity.
More backlink opportunities153
Everything that does not fit the buckets above.
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.