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    • nightly-testing and lean-pr-testing branches of Mathlib
      Lean
      Apache License 2.0
      1.2k1020Updated Apr 3, 2026Apr 3, 2026
    • batteries

      Public
      The "batteries included" extended library for the Lean programming language and theorem prover
      Lean
      Apache License 2.0
      1393692854Updated Apr 3, 2026Apr 3, 2026
    • LeanProject

      Public template
    • blog

      Public
      Source for the community blog
      Python
      28943Updated Apr 3, 2026Apr 3, 2026
    • mathlib4

      Public
      The math library of Lean 4
      Lean
      Apache License 2.0
      1.2k3.1k2692.3kUpdated Apr 3, 2026Apr 3, 2026
    • physlib

      Public
      A project to digitalise results from physics into Lean.
      Lean
      Apache License 2.0
      885356014Updated Apr 3, 2026Apr 3, 2026
    • bors-ng

      Public
      👁 A merge bot for GitHub Pull Requests
      Elixir
      Apache License 2.0
      184200Updated Apr 3, 2026Apr 3, 2026
    • leanprover-community.github.io

      Public
      Hosts the website for mathlib and other Lean community infrastructure.
      CSS
      MIT License
      17475187Updated Apr 3, 2026Apr 3, 2026
    • mathlib_stats

      Public
      Display gitstats output on the mathlib website
      Python
      6200Updated Apr 3, 2026Apr 3, 2026
    • hopscotch

      Public
      hopscotch is an interactive validation tool to assist in keeping your Lean dependencies up to date
      Lean
      Apache License 2.0
      0200Updated Apr 3, 2026Apr 3, 2026
    • ProofWidgets4

      Public
      Helper toolkit for creating your own Lean 4 UserWidgets
      Lean
      Apache License 2.0
      44195131Updated Apr 3, 2026Apr 3, 2026
    • lean-auto

      Public
      Experiments on automation for Lean
      Lean
      Apache License 2.0
      27165100Updated Apr 2, 2026Apr 2, 2026
    • aesop

      Public
      White-box automation for Lean 4
      Lean
      Apache License 2.0
      50348376Updated Apr 2, 2026Apr 2, 2026
    • quote4

      Public
      Intuitive, type-safe expression quotations for Lean 4.
      Lean
      Apache License 2.0
      20102179Updated Apr 2, 2026Apr 2, 2026
    • plausible

      Public
      Lean
      Apache License 2.0
      188506Updated Apr 2, 2026Apr 2, 2026
    • Tool to analyse the import structure of lean projects.
      Lean
      Apache License 2.0
      131940Updated Apr 2, 2026Apr 2, 2026
    • iris-lean

      Public
      Lean 4 port of Iris, a higher-order concurrent separation logic framework
      Lean
      Apache License 2.0
      321661616Updated Apr 2, 2026Apr 2, 2026
    • 0000Updated Apr 2, 2026Apr 2, 2026
    • testing a split of code and data for the queueboard
      Python
      Apache License 2.0
      82251Updated Apr 2, 2026Apr 2, 2026
    • A fork of the mathlib4 repo with CI disabled
      Lean
      Apache License 2.0
      1.2k000Updated Apr 2, 2026Apr 2, 2026
    • Fermat's Last Theorem for regular primes
      Lean
      Apache License 2.0
      36200Updated Apr 2, 2026Apr 2, 2026
    • bundle

      Public
      Create self-contained Lean 4 bundles for offline use
      Python
      Apache License 2.0
      0100Updated Apr 2, 2026Apr 2, 2026
    • Scripts and utilities to support the mathlib repository's CI/CD operations
      Shell
      Apache License 2.0
      2201Updated Apr 2, 2026Apr 2, 2026
    • duper

      Public
      Lean
      Apache License 2.0
      1310710Updated Apr 2, 2026Apr 2, 2026
    • Lean
      MIT License
      01532Updated Apr 1, 2026Apr 1, 2026
    • lean4game

      Public
      Server to host Lean games
      TypeScript
      GNU General Public License v3.0
      8143210711Updated Apr 1, 2026Apr 1, 2026
    • repl

      Public
      A simple REPL for Lean 4, returning information about errors and sorries.
      Lean
      Apache License 2.0
      661942519Updated Mar 31, 2026Mar 31, 2026
    • Formalization of the existence of sphere eversions
      Lean
      Apache License 2.0
      144702Updated Mar 30, 2026Mar 30, 2026
    • TeX
      Apache License 2.0
      51531Updated Mar 25, 2026Mar 25, 2026
    • SpliceBot

      Public
      JavaScript
      MIT License
      3033Updated Mar 21, 2026Mar 21, 2026
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