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Top repositories by stars

• facebook/react(on leaderboard)

  The library for web and native user interfaces.

  JavaScript243,067
• facebook/react-native(on leaderboard)

  A framework for building native applications using React

  C++125,398
• facebook/create-react-app(on leaderboard)

  Set up a modern web app by running one command.

  JavaScript103,930
• facebook/docusaurus(on leaderboard)

  Easy to maintain open source documentation websites.

  TypeScript63,814
• facebook/rocksdb(on leaderboard)

  A library that provides an embeddable, persistent key-value store for fast storage.

  C++31,557
• facebook/folly(on leaderboard)

  An open-source C++ library developed and used at Facebook.

  C++30,256
• facebook/zstd

  Zstandard - Fast real-time compression algorithm

  C26,633
• facebook/lexical

  Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance.

  TypeScript22,965
• facebook/flow

  Adds static typing to JavaScript to improve developer productivity and code quality.

  OCaml22,211
• facebook/prophet

  Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear growth.

  Python20,014
• facebook/relay

  Relay is a JavaScript framework for building data-driven React applications.

  Rust18,930
• facebook/yoga

  Yoga is an embeddable layout engine targeting web standards.

  C++18,730
• facebook/hhvm

  A virtual machine for executing programs written in Hack.

  C++18,604
• facebook/fresco

  An Android library for managing images and the memory they use.

  Java17,157
• facebook/infer

  A static analyzer for Java, C, C++, and Objective-C

  OCaml15,520
• facebook/watchman

  Watches files and records, or triggers actions, when they change.

  C++13,504
• facebook/flipper

  A desktop debugging platform for mobile developers.

  TypeScript13,480
• facebook/stetho

  Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

  Java12,717
• facebook/react-devtools

  An extension that allows inspection of React component hierarchy in the Chrome and Firefox Developer Tools.

  11,030
• facebook/hermes

  A JavaScript engine optimized for running React Native.

  JavaScript10,798
• facebook/jscodeshift

  A JavaScript codemod toolkit.

  JavaScript9,948
• facebook/chisel

  Chisel is a collection of LLDB commands to assist debugging iOS apps.

  Python9,190
• facebook/stylex

  StyleX is the styling system for ambitious user interfaces.

  JavaScript9,124
• facebook/buck

  A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages.

  Java8,565
• facebook/proxygen

  A collection of C++ HTTP libraries including an easy to use HTTP server.

  C++8,331
• facebook/facebook-ios-sdk

  Used to integrate the Facebook Platform with your iOS & tvOS apps.

  Swift8,023
• facebook/litho

  A declarative framework for building efficient UIs on Android.

  Kotlin7,774
• facebook/pyre-check

  Performant type-checking for python.

  OCaml7,145
• facebook/sapling

  A Scalable, User-Friendly Source Control System.

  Rust6,732
• facebook/facebook-android-sdk

  Used to integrate Android apps with Facebook Platform.

  Kotlin6,473
• facebook/redex

  A bytecode optimizer for Android apps

  C++6,275
• facebook/componentkit

  A React-inspired view framework for iOS.

  Objective-C++5,786
• facebook/metro

  🚇 The JavaScript bundler for React Native

  JavaScript5,556
• facebook/fishhook

  A library that enables dynamically rebinding symbols in Mach-O binaries running on iOS.

  C5,380
• facebook/pyrefly

  A fast type checker and language server for Python

  Rust5,376
• facebook/PathPicker

  PathPicker accepts a wide range of input -- output from git commands, grep results, searches -- pretty much anything. After parsing the input, PathPicker presents you with a nice UI to select which files you're interested in. After that you can open them in your favorite editor or execute arbitrary commands.

  Python5,230
• facebook/memlab

  A framework for finding JavaScript memory leaks and analyzing heap snapshots

  JavaScript4,911
• facebook/idb

  idb is a flexible command line interface for automating iOS simulators and devices

  Objective-C4,909
• facebook/prop-types

  Runtime type checking for React props and similar objects

  JavaScript4,470
• facebook/Haxl

  A Haskell library that simplifies access to remote data, such as databases or web-based services.

  Haskell4,443
• facebook/buck2

  Build system, successor to Buck

  Rust4,256
• facebook/duckling

  Language, engine, and tooling for expressing, testing, and evaluating composable language rules on input strings.

  Haskell4,255
• facebook/FBRetainCycleDetector

  iOS library to help detecting retain cycles in runtime.

  Objective-C++4,241
• facebook/fbt

  A JavaScript Internationalization Framework

  JavaScript3,895
• facebook/regenerator

  Source transformer enabling ECMAScript 6 generator functions in JavaScript-of-today.

  JavaScript3,834
• facebook/react-strict-dom

  React Strict DOM (RSD) standardizes the development of styled React components for web and native.

  JavaScript3,481
• facebook/mcrouter

  Mcrouter is a memcached protocol router for scaling memcached deployments.

  C++3,330
• facebook/igl

  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++3,184
• facebook/wangle

  Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.

  C++3,095
• facebook/wdt

  Warp speed Data Transfer (WDT) is an embeddedable library (and command line tool) aiming to transfer data between 2 systems as fast as possible over multiple TCP paths.

  C++2,950
• facebook/openzl

  A novel data compression framework

  C2,921
• facebook/Ax

  Adaptive Experimentation Platform

  Python2,705
• facebook/fbthrift

  Facebook's branch of Apache Thrift, including a new C++ server.

  C++2,676
• facebook/mysql-5.6

  Facebook's branch of the Oracle MySQL database. This includes MyRocks.

  C++2,584
• facebook/react-native-website

  The React Native website and docs

  TypeScript2,102
• facebook/jsx

  The JSX specification is a XML-like syntax extension to ECMAScript.

  HTML1,990
• facebook/fbjs

  A collection of utility libraries used by other Meta JS projects.

  JavaScript1,966
• facebook/screenshot-tests-for-android

  Generate fast deterministic screenshots during Android instrumentation tests

  Java1,750
• facebook/idx

  Library for accessing arbitrarily nested, possibly nullable properties on a JavaScript object.

  JavaScript1,687
• facebook/mvfst

  An implementation of the QUIC transport protocol.

  C++1,634
• facebook/CacheLib

  Pluggable in-process caching engine to build and scale high performance services

  C++1,498
• facebook/facebook-python-business-sdk

  Python SDK for Meta Marketing APIs

  Python1,492
• facebook/TextLayoutBuilder

  An Android library that allows you to build text layouts more easily.

  Kotlin1,473
• facebook/SoLoader

  Native code loader for Android

  Java1,423
• facebook/ThreatExchange

  Trust & Safety tools for working together to fight digital harms.

  C++1,317
• facebook/mariana-trench

  A security focused static analysis tool for Android and Java applications.

  C++1,213
• facebook/ktfmt

  A program that reformats Kotlin source code to comply with the common community standard for Kotlin code conventions.

  Kotlin1,206
• facebook/transform360

  Transform360 is an equirectangular to cubemap transform for 360 video.

  C++1,036
• facebook/fatal

  Fatal is a library for fast prototyping software in modern C++. It provides facilities to enhance the expressive power of C++. The library is heavily based on template meta-programming, while keeping the complexity under-the-hood.

  C++1,019
• facebook/fboss

  Facebook Open Switching System Software for controlling network switches.

  C++955
• facebook/starlark-rust

  A Rust implementation of the Starlark language

  Rust939
• facebook/openr

  Distributed platform for building autonomic network functions.

  C++928
• facebook/facebook-php-business-sdk

  PHP SDK for Meta Marketing API

  PHP897
• facebook/winterfell

  A STARK prover and verifier for arbitrary computations

  Rust884
• facebook/dotslash

  Simplified executable deployment

  Rust809
• facebook/openbmc

  OpenBMC is an open software framework to build a complete Linux image for a Board Management Controller (BMC).

  C671
• facebook/SPARTA

  SPARTA is a library of software components specially designed for building high-performance static analyzers based on the theory of Abstract Interpretation.

  C++665
• facebook/pyre2

  Python wrapper for RE2

  C++646
• facebook/lexical-ios

  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.

  Swift645
• facebook/time

  Meta's Time libraries

  Go640
• facebook/Rapid

  The OpenStreetMap editor driven by open data, AI, and supercharged features

  JavaScript616
• facebook/chef-cookbooks

  Open source chef cookbooks.

  Ruby583
• facebook/facebook-nodejs-business-sdk

  Node.js SDK for Meta Marketing APIs

  JavaScript575
• facebook/IT-CPE

  Meta's Client Platform Engineering tools. Some of the tools we have written to help manage our fleet of client systems.

  Ruby570
• facebook/facebook-sdk-for-unity

  The facebook sdk for unity.

  C#500
• facebook/open-graph-protocol

  PHP453
• facebook/facebook-java-business-sdk

  Java SDK for Meta Marketing APIs

  Java451
• facebook/immersive-web-sdk

  WebXR made simple. Full-featured framework with interactions, locomotion, and spatial UI. Powered by Three.js.

  TypeScript445
• facebook/FAI-PEP

  Facebook AI Performance Evaluation Platform

  Python392
• facebook/opaque-ke

  An implementation of the OPAQUE password-authenticated key exchange protocol

  Rust380
• facebook/bpfilter

  eBPF-based packet filtering framework

  C310
• facebook/akd

  An implementation of an auditable key directory

  Rust307
• facebook/dns

  Collection of Meta's DNS Libraries

  Go291
• facebook/chef-utils

  Utilities related to Chef

  Ruby290
• facebook/facebook360_dep

  Facebook360 Depth Estimation Pipeline - https://facebook.github.io/facebook360_dep

  HTML257
• facebook/facebook-for-woocommerce

  The official plugin from Meta. This repository is now officially maintained by Meta's engineering team. We welcome and encourage contributions from the community.

  PHP249
• facebook/meta-wearables-dat-ios

  Meta Wearables Device Access Toolkit for iOS

  247
• facebook/jemalloc

  Meta fork of the OG Jemalloc project

  C239
• facebook/tac_plus

  A Tacacs+ Daemon tested on Linux (CentOS) to run AAA via TACACS+ Protocol via IPv4 and IPv6.

  C234
• facebook/facebook-ruby-business-sdk

  Ruby SDK for Meta Marketing API

  Ruby216