34j/best-of-lean4

A list of awesome lean4 projects. Feel free to add your project.

147

159 commits

updated Sep 21, 2026

See the code

README

best-of-lean4

🏆  A ranked list of awesome projects. Updated weekly.

This curated list contains 24 awesome open-source projects with a total of 0 stars grouped into 11 categories. All projects are ranked by a project-quality score, which is calculated based on various metrics automatically collected from GitHub and different package managers. If you like to add or update projects, feel free to open an issue, submit a pull request, or directly edit the projects.yaml. Contributions are very welcome!

🧙‍♂️ Discover other best-of lists or create your own.

Contents

Explanation

  • 🥇🥈🥉  Combined project-quality score
  • ⭐️  Star count from GitHub
  • 🐣  New project (less than 6 months old)
  • 💤  Inactive project (6 months no activity)
  • 💀  Dead project (12 months no activity)
  • 📈📉  Project is trending up or down
  • ➕  Project was recently added
  • ❗️  Warning (e.g. missing/risky license)
  • 👨‍💻  Contributors count from GitHub
  • 🔀  Fork count from GitHub
  • 📋  Issue count from GitHub
  • ⏱️  Last update timestamp on package manager
  • 📥  Download count from package manager
  • 📦  Number of dependent projects

Cheatsheets

Back to top

Quick reference with short text

(Mathlib4) General Documentation (API Reference) (🥈1) - Official Mathlib API Reference. ❗Unlicensed
  • GitHub (👨‍💻 9):

    ```
    git clone https://github.com/leanprover-community/mathlib4_docs
    ```
    
Moogle: Semantic search over mathlib4 (🥈1) - Better performance (latency) than `General.. ❗Unlicensed
  • No project information available.

  • Lean by Example (🥈1) - Lean. ❗Unlicensed ja
    • GitHub (👨‍💻 3):

      ```
      git clone https://github.com/lean-ja/lean-ja.github.io
      ```
      
    `#help` command output (🥈1) - Output of `#help option`, `#help attr`, ... shown in.. ❗Unlicensed
  • No project information available.

  • Show 3 hidden projects...

    Tutorials

    Back to top

    Tutorials with long text

    The Lean Reference Manual (🥇1) - Official Lean 3 Reference Manual. ❗Unlicensed Lean 3
    • No project information available.
    Mathematics in Lean (🥇1) - Note that there are many parts of the documentation at.. ❗Unlicensed
    • GitHub (👨‍💻 3):

      ```
      git clone https://github.com/leanprover-community/mathematics_in_lean
      ```
      
    The mechanics of proof (🥇1) - Early university level course. ❗Unlicensed
  • GitHub:

    ```
    git clone https://github.com/hrmacbeth/math2001
    ```
    
  • Lean Manual (🥇1) - Official Manual. ❗Unlicensed
  • No project information available.

  • Show 2 hidden projects...

    Samples

    Back to top

    Actual Lean 4 code for learning purposes


    Packages (Meta)

    Back to top

    Reusable Lean 4 code for enhancing usability


    Packages

    Back to top

    Reusable Lean 4 code (theorems, etc.)

    K-Lean (🥇1) - 64 machine-verified contracts for computational biology. sorry-free. Covers.. ❗Unlicensed
    • GitHub:

      ```
      git clone https://github.com/Heime-Jorgen/kenosian-lean4
      ```
      

    Core packages

    Back to top

    Core Lean 4 code


    Games

    Back to top

    Lean 4 Games

    Lean Game Server (🥇2) - Mainly for Natural Number Game. Be careful not to confuse this.. ❗Unlicensed
    • GitHub (👨‍💻 41):

      ```
      git clone https://github.com/leanprover-community/lean4game
      ```
      

    Community

    Back to top

    Community

    Zulip chat for discussions about Lean and mathlib (🥇1) - Official community. ❗Unlicensed
    • No project information available.
    Lean 4 Anarchy (Discord) (🥇1) - Anarchy discord server. ❗Unlicensed
    • No project information available.

    Tools

    Back to top

    Tools not made in Lean 4

    lean4web (🥇1) - Web editor. ❗Unlicensed
    • GitHub (👨‍💻 20):

      ```
      git clone https://github.com/leanprover-community/lean4web
      ```
      
    Reservoir (🥇1) - Lakes package registry. ❗Unlicensed
  • GitHub (👨‍💻 4):

    ```
    git clone https://github.com/leanprover/reservoir
    ```
    

  • Other awesome lists

    Back to top

    Links (lean-lang.org) (🥇1) - Official collection of links. ❗Unlicensed
    • No project information available.
    LEAN JA リンク集 (🥇1) - Japanese translated versions of several tutorials are.. ❗Unlicensed ja
    • GitHub (👨‍💻 3):

      ```
      git clone https://github.com/lean-ja/lean-ja.github.io
      ```
      
    lean4 - Where is the syntax of Lean 4 documented? - Proof Assistants Stack Exchange (🥇1) - Discussion regarding Lean 4 documentation. ❗Unlicensed
  • No project information available.


  • Movies

    Back to top

    lean4 - YouTube (🥇1) - YouTube movies. ❗Unlicensed
    • No project information available.
    人気の「Lean」動画 14本 - ニコニコ動画 (🥇1) - Niconico movies. Entertaining instructions using TTS.. ❗Unlicensed ja
    • No project information available.

    • Best-of lists: Discover other best-of lists with awesome open-source projects on all kinds of topics.

    Contribution

    Contributions are encouraged and always welcome! If you like to add or update projects, choose one of the following ways:

    • Open an issue by selecting one of the provided categories from the issue page and fill in the requested information.
    • Modify the projects.yaml with your additions or changes, and submit a pull request. This can also be done directly via the Github UI.

    If you like to contribute to or share suggestions regarding the project metadata collection or markdown generation, please refer to the best-of-generator repository. If you like to create your own best-of list, we recommend to follow this guide.

    For more information on how to add or update projects, please read the contribution guidelines. By participating in this project, you agree to abide by its Code of Conduct.

    License

    CC0

    awesome
    best-of
    lean
    lean4

    Contributors

    renovate[bot]

    50 commits

    34j

    35 commits

    34j/best-of-lean4

    A list of awesome lean4 projects. Feel free to add your project.

    147

    159 commits

    updated Sep 21, 2026

    See the code

    README

    best-of-lean4

    🏆  A ranked list of awesome projects. Updated weekly.

    This curated list contains 24 awesome open-source projects with a total of 0 stars grouped into 11 categories. All projects are ranked by a project-quality score, which is calculated based on various metrics automatically collected from GitHub and different package managers. If you like to add or update projects, feel free to open an issue, submit a pull request, or directly edit the projects.yaml. Contributions are very welcome!

    🧙‍♂️ Discover other best-of lists or create your own.

    Contents

    Explanation

    • 🥇🥈🥉  Combined project-quality score
    • ⭐️  Star count from GitHub
    • 🐣  New project (less than 6 months old)
    • 💤  Inactive project (6 months no activity)
    • 💀  Dead project (12 months no activity)
    • 📈📉  Project is trending up or down
    • ➕  Project was recently added
    • ❗️  Warning (e.g. missing/risky license)
    • 👨‍💻  Contributors count from GitHub
    • 🔀  Fork count from GitHub
    • 📋  Issue count from GitHub
    • ⏱️  Last update timestamp on package manager
    • 📥  Download count from package manager
    • 📦  Number of dependent projects

    Cheatsheets

    Back to top

    Quick reference with short text

    (Mathlib4) General Documentation (API Reference) (🥈1) - Official Mathlib API Reference. ❗Unlicensed
    • GitHub (👨‍💻 9):

      ```
      git clone https://github.com/leanprover-community/mathlib4_docs
      ```
      
    Moogle: Semantic search over mathlib4 (🥈1) - Better performance (latency) than `General.. ❗Unlicensed
  • No project information available.

  • Lean by Example (🥈1) - Lean. ❗Unlicensed ja
    • GitHub (👨‍💻 3):

      ```
      git clone https://github.com/lean-ja/lean-ja.github.io
      ```
      
    `#help` command output (🥈1) - Output of `#help option`, `#help attr`, ... shown in.. ❗Unlicensed
  • No project information available.

  • Show 3 hidden projects...

    Tutorials

    Back to top

    Tutorials with long text

    The Lean Reference Manual (🥇1) - Official Lean 3 Reference Manual. ❗Unlicensed Lean 3
    • No project information available.
    Mathematics in Lean (🥇1) - Note that there are many parts of the documentation at.. ❗Unlicensed
    • GitHub (👨‍💻 3):

      ```
      git clone https://github.com/leanprover-community/mathematics_in_lean
      ```
      
    The mechanics of proof (🥇1) - Early university level course. ❗Unlicensed
  • GitHub:

    ```
    git clone https://github.com/hrmacbeth/math2001
    ```
    
  • Lean Manual (🥇1) - Official Manual. ❗Unlicensed
  • No project information available.

  • Show 2 hidden projects...

    Samples

    Back to top

    Actual Lean 4 code for learning purposes


    Packages (Meta)

    Back to top

    Reusable Lean 4 code for enhancing usability


    Packages

    Back to top

    Reusable Lean 4 code (theorems, etc.)

    K-Lean (🥇1) - 64 machine-verified contracts for computational biology. sorry-free. Covers.. ❗Unlicensed
    • GitHub:

      ```
      git clone https://github.com/Heime-Jorgen/kenosian-lean4
      ```
      

    Core packages

    Back to top

    Core Lean 4 code


    Games

    Back to top

    Lean 4 Games

    Lean Game Server (🥇2) - Mainly for Natural Number Game. Be careful not to confuse this.. ❗Unlicensed
    • GitHub (👨‍💻 41):

      ```
      git clone https://github.com/leanprover-community/lean4game
      ```
      

    Community

    Back to top

    Community

    Zulip chat for discussions about Lean and mathlib (🥇1) - Official community. ❗Unlicensed
    • No project information available.
    Lean 4 Anarchy (Discord) (🥇1) - Anarchy discord server. ❗Unlicensed
    • No project information available.

    Tools

    Back to top

    Tools not made in Lean 4

    lean4web (🥇1) - Web editor. ❗Unlicensed
    • GitHub (👨‍💻 20):

      ```
      git clone https://github.com/leanprover-community/lean4web
      ```
      
    Reservoir (🥇1) - Lakes package registry. ❗Unlicensed
  • GitHub (👨‍💻 4):

    ```
    git clone https://github.com/leanprover/reservoir
    ```
    

  • Other awesome lists

    Back to top

    Links (lean-lang.org) (🥇1) - Official collection of links. ❗Unlicensed
    • No project information available.
    LEAN JA リンク集 (🥇1) - Japanese translated versions of several tutorials are.. ❗Unlicensed ja
    • GitHub (👨‍💻 3):

      ```
      git clone https://github.com/lean-ja/lean-ja.github.io
      ```
      
    lean4 - Where is the syntax of Lean 4 documented? - Proof Assistants Stack Exchange (🥇1) - Discussion regarding Lean 4 documentation. ❗Unlicensed
  • No project information available.


  • Movies

    Back to top

    lean4 - YouTube (🥇1) - YouTube movies. ❗Unlicensed
    • No project information available.
    人気の「Lean」動画 14本 - ニコニコ動画 (🥇1) - Niconico movies. Entertaining instructions using TTS.. ❗Unlicensed ja
    • No project information available.

    • Best-of lists: Discover other best-of lists with awesome open-source projects on all kinds of topics.

    Contribution

    Contributions are encouraged and always welcome! If you like to add or update projects, choose one of the following ways:

    • Open an issue by selecting one of the provided categories from the issue page and fill in the requested information.
    • Modify the projects.yaml with your additions or changes, and submit a pull request. This can also be done directly via the Github UI.

    If you like to contribute to or share suggestions regarding the project metadata collection or markdown generation, please refer to the best-of-generator repository. If you like to create your own best-of list, we recommend to follow this guide.

    For more information on how to add or update projects, please read the contribution guidelines. By participating in this project, you agree to abide by its Code of Conduct.

    License

    CC0

    awesome
    best-of
    lean
    lean4

    Contributors

    renovate[bot]

    50 commits

    34j

    35 commits