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    • hhvm

      Public
      A virtual machine for executing programs written in Hack.
      C++
      Other
      3.1k19k408129Updated Jun 7, 2026Jun 7, 2026
    • sapling

      Public
      A Scalable, User-Friendly Source Control System.
      Rust
      GNU General Public License v2.0
      3706.9k23083Updated Jun 7, 2026Jun 7, 2026
    • buck2

      Public
      Build system, successor to Buck
      Rust
      Apache License 2.0
      3594.4k29390Updated Jun 7, 2026Jun 7, 2026
    • A Rust implementation of the Starlark language
      Rust
      Apache License 2.0
      1029782913Updated Jun 7, 2026Jun 7, 2026
    • flow

      Public
      Adds static typing to JavaScript to improve developer productivity and code quality.
      Rust
      MIT License
      1.9k22k59510Updated Jun 7, 2026Jun 7, 2026
    • pyrefly

      Public
      A fast type checker and language server for Python
      Rust
      MIT License
      3896.6k497126Updated Jun 7, 2026Jun 7, 2026
    • dotslash

      Public
      Simplified executable deployment
      Rust
      Apache License 2.0
      65850217Updated Jun 7, 2026Jun 7, 2026
    • proxygen

      Public
      A collection of C++ HTTP libraries including an easy to use HTTP server.
      C++
      Other
      1.5k8.3k2415Updated Jun 7, 2026Jun 7, 2026
    • fboss

      Public
      Facebook Open Switching System Software for controlling network switches.
      C++
      Other
      39397425125Updated Jun 7, 2026Jun 7, 2026
    • idb

      Public
      idb is a flexible command line interface for automating iOS simulators and devices
      Swift
      MIT License
      4955.1k17010Updated Jun 7, 2026Jun 7, 2026
    • relay

      Public
      Relay is a JavaScript framework for building data-driven React applications.
      Rust
      MIT License
      1.9k19k629213Updated Jun 7, 2026Jun 7, 2026
    • fbthrift

      Public
      Facebook's branch of Apache Thrift, including a new C++ server.
      C++
      Apache License 2.0
      6342.7k454Updated Jun 7, 2026Jun 7, 2026
    • react

      Public
      The library for web and native user interfaces.
      JavaScript
      MIT License
      51k246k839493Updated Jun 7, 2026Jun 7, 2026
    • wangle

      Public
      Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.
      C++
      Apache License 2.0
      5433.1k3413Updated Jun 7, 2026Jun 7, 2026
    • watchman

      Public
      Watches files and records, or triggers actions, when they change.
      C++
      MIT License
      1.1k14k21533Updated Jun 7, 2026Jun 7, 2026
    • fb303

      Public
      fb303 is a core set of thrift functions that provide a common mechanism for querying stats and other information from a service.
      C++
      Apache License 2.0
      6392613Updated Jun 7, 2026Jun 7, 2026
    • openr

      Public
      Distributed platform for building autonomic network functions.
      C++
      MIT License
      2509351111Updated Jun 7, 2026Jun 7, 2026
    • mvfst

      Public
      An implementation of the QUIC transport protocol.
      C++
      MIT License
      2841.6k277Updated Jun 7, 2026Jun 7, 2026
    • folly

      Public
      An open-source C++ library developed and used at Facebook.
      C++
      Apache License 2.0
      5.9k30k313135Updated Jun 7, 2026Jun 7, 2026
    • CacheLib

      Public
      Pluggable in-process caching engine to build and scale high performance services
      C++
      Apache License 2.0
      3201.5k019Updated Jun 7, 2026Jun 7, 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
      2614407Updated Jun 6, 2026Jun 6, 2026
    • Lifeguard

      Public
      Lifeguard is a static analyzer to detect Lazy Imports incompatibilities and ease the adoption overhead for Lazy Imports in Python
      Python
      MIT License
      57301Updated Jun 6, 2026Jun 6, 2026
    • A framework for building native applications using React
      C++
      MIT License
      25k126k714341Updated Jun 6, 2026Jun 6, 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
      2133.2k32Updated Jun 6, 2026Jun 6, 2026
    • The React Native website and docs
      MDX
      MIT License
      6.1k2.1k985Updated Jun 6, 2026Jun 6, 2026
    • LightweightVK is a deeply refactored bindless-only fork of IGL which is designed to run on top of modern Vulkan 1.3 with optional mesh shaders and ray tracing s…
      C++
      Other
      213100Updated Jun 6, 2026Jun 6, 2026
    • infer

      Public
      A static analyzer for Java, C, C++, and Objective-C
      OCaml
      MIT License
      2.1k16k4148Updated Jun 6, 2026Jun 6, 2026
    • rocksdb

      Public
      A library that provides an embeddable, persistent key-value store for fast storage.
      C++
      GNU General Public License v2.0
      6.8k32k885647Updated Jun 6, 2026Jun 6, 2026
    • A pre-commit hook for Pyrefly.
      Python
      MIT License
      42710Updated Jun 6, 2026Jun 6, 2026
    • hermes

      Public
      A JavaScript engine optimized for running React Native.
      JavaScript
      MIT License
      79811k13087Updated Jun 6, 2026Jun 6, 2026
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