Repositories list

• buck2

  Public

  facebook/buck2’s past year of commit activity
  Build system, successor to Buck

  Rust

  •

  Apache License 2.0

  •312•4.2k•270•41•Updated Dec 17, 2025Dec 17, 2025

• hhvm

  Public

  facebook/hhvm’s past year of commit activity
  A virtual machine for executing programs written in Hack.

  phphackhhvm+ 1hacklang

  C++

  •

  Other

  •3.1k•19k•407•116•Updated Dec 17, 2025Dec 17, 2025

• pyrefly

  Public
  A fast type checker and language server for Python

  pythonrusttypechecker+ 12typeslanguage-serveridetypingcode-qualityhacktoberfesttypecheck+ 5

  Rust

  •

  MIT License

  •226•5.1k•394•37•Updated Dec 17, 2025Dec 17, 2025

• lexical

  Public

  facebook/lexical’s past year of commit activity
  Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance.

  TypeScript

  •

  MIT License

  •2.1k•23k•530•33•Updated Dec 17, 2025Dec 17, 2025

• fboss

  Public

  facebook/fboss’s past year of commit activity
  Facebook Open Switching System Software for controlling network switches.

  C++

  •

  Other

  •365•937•25•78•Updated Dec 17, 2025Dec 17, 2025

• proxygen

  Public

  facebook/proxygen’s past year of commit activity
  A collection of C++ HTTP libraries including an easy to use HTTP server.

  C++

  •

  Other

  •1.5k•8.3k•22•14•Updated Dec 17, 2025Dec 17, 2025

• buck2-prelude

  Public

  facebook/buck2-prelude’s past year of commit activity
  Prelude for the Buck2 project

  Starlark

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  Apache License 2.0

  •52•58•1•1•Updated Dec 17, 2025Dec 17, 2025

• react-native

  Public

  facebook/react-native’s past year of commit activity
  A framework for building native applications using React

  reactandroidios+ 5mobilereact-nativecross-platformapp-frameworkmobile-development

  C++

  •

  MIT License

  •25k•125k•708•400•Updated Dec 17, 2025Dec 17, 2025

• ktfmt

  Public

  facebook/ktfmt’s past year of commit activity
  A program that reformats Kotlin source code to comply with the common community standard for Kotlin code conventions.

  Kotlin

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  Apache License 2.0

  •91•1.1k•43•2•Updated Dec 17, 2025Dec 17, 2025

• flow

  Public

  facebook/flow’s past year of commit activity
  Adds static typing to JavaScript to improve developer productivity and code quality.

  OCaml

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  MIT License

  •1.9k•22k•600•15•Updated Dec 17, 2025Dec 17, 2025

• sapling

  Public

  facebook/sapling’s past year of commit activity
  A Scalable, User-Friendly Source Control System.

  Rust

  •

  GNU General Public License v2.0

  •327•6.7k•227•53•Updated Dec 17, 2025Dec 17, 2025

• Rapid

  Public

  facebook/Rapid’s past year of commit activity
  The OpenStreetMap editor driven by open data, AI, and supercharged features

  JavaScript

  •

  ISC License

  •116•607•290•10•Updated Dec 17, 2025Dec 17, 2025

• relay

  Public

  facebook/relay’s past year of commit activity
  Relay is a JavaScript framework for building data-driven React applications.

  Rust

  •

  MIT License

  •1.9k•19k•617•169•Updated Dec 17, 2025Dec 17, 2025

• gfxbench

  Public

  facebook/gfxbench’s past year of commit activity
  C

  •

  Other

  •16•1•0•0•Updated Dec 17, 2025Dec 17, 2025

• folly

  Public

  facebook/folly’s past year of commit activity
  An open-source C++ library developed and used at Facebook.

  C++

  •

  Apache License 2.0

  •5.8k•30k•305•117•Updated Dec 17, 2025Dec 17, 2025

• hermes

  Public

  facebook/hermes’s past year of commit activity
  A JavaScript engine optimized for running React Native.

  JavaScript

  •

  MIT License

  •716•11k•118•56•Updated Dec 17, 2025Dec 17, 2025

• Ax

  Public

  facebook/Ax’s past year of commit activity
  Adaptive Experimentation Platform

  Python

  •

  MIT License

  •355•2.7k•30•124•Updated Dec 17, 2025Dec 17, 2025

• infer

  Public

  facebook/infer’s past year of commit activity
  A static analyzer for Java, C, C++, and Objective-C

  cjavaobjective-c+ 4cppstatic-code-analysisstatic-analysiscode-quality

  OCaml

  •

  MIT License

  •2.1k•15k•391•9•Updated Dec 17, 2025Dec 17, 2025

• mcrouter

  Public

  facebook/mcrouter’s past year of commit activity
  Mcrouter is a memcached protocol router for scaling memcached deployments.

  C++

  •

  MIT License

  •549•3.3k•97•21•Updated Dec 17, 2025Dec 17, 2025

• igl

  Public

  facebook/igl’s past year of commit activity
  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 graphics APIs (e.g. OpenGL, Metal and Vulkan).

  C++

  •

  Other

  •200•3.2k•5•7•Updated Dec 17, 2025Dec 17, 2025

• fbthrift

  Public

  facebook/fbthrift’s past year of commit activity
  Facebook's branch of Apache Thrift, including a new C++ server.

  C++

  •

  Apache License 2.0

  •626•2.7k•44•6•Updated Dec 17, 2025Dec 17, 2025

• react

  Public

  facebook/react’s past year of commit activity
  The library for web and native user interfaces.

  reactjavascriptlibrary+ 3uifrontenddeclarative

  JavaScript

  •

  MIT License

  •50k•242k•846•245•Updated Dec 17, 2025Dec 17, 2025

• facebook-for-woocommerce

  Public

  facebook/facebook-for-woocommerce’s past year of commit activity
  The official plugin from Meta. This repository is now officially maintained by Meta's engineering team. We welcome and encourage contributions from the community.

  PHP

  •

  GNU General Public License v2.0

  •178•243•73•112•Updated Dec 17, 2025Dec 17, 2025

• pyre-check

  Public

  facebook/pyre-check’s past year of commit activity
  Performant type-checking for python.

  pythonsecuritytypechecker+ 8static-analysisocamlcontrol-flow-analysiscode-qualityprogram-analysistaint-analysisabstract-interpretation+ 1

  OCaml

  •

  MIT License

  •452•7.1k•131•26•Updated Dec 17, 2025Dec 17, 2025

• watchman

  Public

  facebook/watchman’s past year of commit activity
  Watches files and records, or triggers actions, when they change.

  C++

  •

  MIT License

  •1k•13k•210•22•Updated Dec 17, 2025Dec 17, 2025

• fb303

  Public

  facebook/fb303’s past year of commit activity
  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

  •59•86•6•13•Updated Dec 17, 2025Dec 17, 2025

• openr

  Public

  facebook/openr’s past year of commit activity
  Distributed platform for building autonomic network functions.

  C++

  •

  MIT License

  •244•925•10•10•Updated Dec 17, 2025Dec 17, 2025

• wangle

  Public

  facebook/wangle’s past year of commit activity
  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

  •547•3.1k•34•12•Updated Dec 17, 2025Dec 17, 2025

• mvfst

  Public

  facebook/mvfst’s past year of commit activity
  An implementation of the QUIC transport protocol.

  C++

  •

  MIT License

  •273•1.6k•37•5•Updated Dec 17, 2025Dec 17, 2025

• CacheLib

  Public

  facebook/CacheLib’s past year of commit activity
  Pluggable in-process caching engine to build and scale high performance services

  performancecppcache+ 3concurrencyssdcache-engine

  C++

  •

  Apache License 2.0

  •308•1.5k•15•20•Updated Dec 17, 2025Dec 17, 2025