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    • pyrefly

      Public
      A fast type checker and language server for Python
      Rust
      MIT License
      3145.6k430127Updated Apr 23, 2026Apr 23, 2026
    • stylex

      Public
      StyleX is the styling system for ambitious user interfaces.
      JavaScript
      MIT License
      4099.1k10452Updated Apr 23, 2026Apr 23, 2026
    • lexical

      Public
      Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance.
      TypeScript
      MIT License
      2.1k23k50521Updated Apr 23, 2026Apr 23, 2026
    • CacheLib

      Public
      Pluggable in-process caching engine to build and scale high performance services
      C++
      Apache License 2.0
      3191.5k1533Updated Apr 23, 2026Apr 23, 2026
    • metro

      Public
      🚇 The JavaScript bundler for React Native
      JavaScript
      MIT License
      6775.6k36474Updated Apr 23, 2026Apr 23, 2026
    • ocamlrep

      Public
      Sets of libraries and tools to write applications and libraries mixing OCaml and Rust. These libraries will help keeping your types and data structures synchron…
      Rust
      MIT License
      2514106Updated Apr 23, 2026Apr 23, 2026
    • buck2

      Public
      Build system, successor to Buck
      Rust
      Apache License 2.0
      3414.3k29293Updated Apr 23, 2026Apr 23, 2026
    • sapling

      Public
      A Scalable, User-Friendly Source Control System.
      Rust
      GNU General Public License v2.0
      3646.8k22665Updated Apr 23, 2026Apr 23, 2026
    • buck2-shims-meta

      Public
      Shims to convert Meta internal buck2 macros/targets for open source build compatibility.
      Starlark
      Apache License 2.0
      7501Updated Apr 23, 2026Apr 23, 2026
    • react-native

      Public
      A framework for building native applications using React
      C++
      MIT License
      25k126k759522Updated Apr 23, 2026Apr 23, 2026
    • fbthrift

      Public
      Facebook's branch of Apache Thrift, including a new C++ server.
      C++
      Apache License 2.0
      6322.7k455Updated Apr 23, 2026Apr 23, 2026
    • starlark-rust

      Public
      A Rust implementation of the Starlark language
      Rust
      Apache License 2.0
      909623124Updated Apr 23, 2026Apr 23, 2026
    • pyre-check

      Public
      Performant type-checking for python.
      OCaml
      MIT License
      4497.2k13230Updated Apr 23, 2026Apr 23, 2026
    • buck2-prelude

      Public
      Prelude for the Buck2 project
      Starlark
      Apache License 2.0
      596511Updated Apr 23, 2026Apr 23, 2026
    • flow

      Public
      Adds static typing to JavaScript to improve developer productivity and code quality.
      Rust
      MIT License
      1.9k22k59711Updated Apr 23, 2026Apr 23, 2026
    • igl

      Public
      Intermediate Graphics Library (IGL) is a cross-platform library that commands the GPU. It provides a single low-level cross-platform interface on top of various…
      C++
      Other
      2113.2k39Updated Apr 23, 2026Apr 23, 2026
    • lexical-ios

      Public
      Lexical iOS is an extensible text editor framework that integrates the APIs and philosophies from Lexical Web with a Swift API built on top of TextKit.
      Swift
      MIT License
      60655219Updated Apr 23, 2026Apr 23, 2026
    • fboss

      Public
      Facebook Open Switching System Software for controlling network switches.
      C++
      Other
      38596425118Updated Apr 23, 2026Apr 23, 2026
    • IT-CPE

      Public
      Meta's Client Platform Engineering tools. Some of the tools we have written to help manage our fleet of client systems.
      Ruby
      Apache License 2.0
      116571612Updated Apr 23, 2026Apr 23, 2026
    • immersive-web-sdk

      Public
      WebXR made simple. Full-featured framework with interactions, locomotion, and spatial UI. Powered by Three.js.
      TypeScript
      MIT License
      75401177Updated Apr 23, 2026Apr 23, 2026
    • redex

      Public
      A bytecode optimizer for Android apps
      C++
      MIT License
      6816.3k5617Updated Apr 23, 2026Apr 23, 2026
    • rocksdb

      Public
      A library that provides an embeddable, persistent key-value store for fast storage.
      C++
      GNU General Public License v2.0
      6.8k32k868616Updated Apr 23, 2026Apr 23, 2026
    • proxygen

      Public
      A collection of C++ HTTP libraries including an easy to use HTTP server.
      C++
      Other
      1.5k8.3k2412Updated Apr 23, 2026Apr 23, 2026
    • hermes

      Public
      A JavaScript engine optimized for running React Native.
      JavaScript
      MIT License
      76211k12979Updated Apr 23, 2026Apr 23, 2026
    • bunnylol.rs

      Public
      bunnylol is a tool for writing smart bookmarks. Use in your browser, or on the command-line
      Rust
      MIT License
      2812721Updated Apr 23, 2026Apr 23, 2026
    • folly

      Public
      An open-source C++ library developed and used at Facebook.
      C++
      Apache License 2.0
      5.9k30k333132Updated Apr 23, 2026Apr 23, 2026
    • squangle

      Public
      SQuangLe is a C++ API for accessing MySQL servers
      C++
      Other
      5412720Updated Apr 23, 2026Apr 23, 2026
    • OpenBIC

      Public
      BICs (Bridge IC) are standalone devices deployed within a Data Center that enable monitoring a multi-host system using a single BMC device.
      C
      Apache License 2.0
      556554Updated Apr 23, 2026Apr 23, 2026
    • relay

      Public
      Relay is a JavaScript framework for building data-driven React applications.
      Rust
      MIT License
      1.9k19k626212Updated Apr 23, 2026Apr 23, 2026
    • react-native-website

      Public
      The React Native website and docs
      MDX
      MIT License
      6k2.1k998Updated Apr 22, 2026Apr 22, 2026
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