Repositories list

• 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•618•168•Updated Jan 4, 2026Jan 4, 2026

• pyrefly

  Public

  facebook/pyrefly’s past year of commit activity
  A fast type checker and language server for Python

  pythonrusttypechecker+ 12typeslanguage-serveridetypingcode-qualityhacktoberfesttypecheck+ 5

  Rust

  •

  MIT License

  •237•5.2k•392•59•Updated Jan 4, 2026Jan 4, 2026

• react-native-website

  Public

  facebook/react-native-website’s past year of commit activity
  The React Native website and docs

  reactreact-nativedocusaurus

  TypeScript

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  MIT License

  •5.7k•2.1k•14•98•Updated Jan 4, 2026Jan 4, 2026

• stylex

  Public

  facebook/stylex’s past year of commit activity
  StyleX is the styling system for ambitious user interfaces.

  JavaScript

  •

  MIT License

  •373•9k•88•21•Updated Jan 4, 2026Jan 4, 2026

• buck2

  Public

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

  Rust

  •

  Apache License 2.0

  •316•4.2k•274•49•Updated Jan 4, 2026Jan 4, 2026

• fboss

  Public

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

  C++

  •

  Other

  •368•938•25•83•Updated Jan 4, 2026Jan 4, 2026

• 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•119•Updated Jan 4, 2026Jan 4, 2026

• mvfst

  Public

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

  C++

  •

  MIT License

  •274•1.6k•37•5•Updated Jan 3, 2026Jan 3, 2026

• proxygen

  Public

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

  C++

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  Other

  •1.5k•8.3k•22•14•Updated Jan 3, 2026Jan 3, 2026

• 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•87•6•12•Updated Jan 3, 2026Jan 3, 2026

• sapling

  Public

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

  Rust

  •

  GNU General Public License v2.0

  •331•6.7k•227•55•Updated Jan 3, 2026Jan 3, 2026

• 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

  •546•3.1k•34•12•Updated Jan 3, 2026Jan 3, 2026

• ocamlrep

  Public

  facebook/ocamlrep’s past year of commit activity
  Sets of libraries and tools to write applications and libraries mixing OCaml and Rust. These libraries will help keeping your types and data structures synchronized, and enable seamless exchange between OCaml and Rust

  Rust

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  MIT License

  •24•138•0•5•Updated Jan 3, 2026Jan 3, 2026

• 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•5•Updated Jan 3, 2026Jan 3, 2026

• 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•307•121•Updated Jan 3, 2026Jan 3, 2026

• 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•211•23•Updated Jan 3, 2026Jan 3, 2026

• openr

  Public

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

  C++

  •

  MIT License

  •244•924•10•10•Updated Jan 3, 2026Jan 3, 2026

• 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

  •310•1.5k•15•23•Updated Jan 3, 2026Jan 3, 2026

• openbmc

  Public

  facebook/openbmc’s past year of commit activity
  OpenBMC is an open software framework to build a complete Linux image for a Board Management Controller (BMC).

  C

  •

  Apache License 2.0

  •301•667•43•7•Updated Jan 3, 2026Jan 3, 2026

• hermes

  Public

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

  JavaScript

  •

  MIT License

  •723•11k•119•59•Updated Jan 3, 2026Jan 3, 2026

• 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•841•260•Updated Jan 3, 2026Jan 3, 2026

• 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•602•14•Updated Jan 3, 2026Jan 3, 2026

• rocksdb

  Public

  facebook/rocksdb’s past year of commit activity
  A library that provides an embeddable, persistent key-value store for fast storage.

  databasestorage-engine

  C++

  •

  GNU General Public License v2.0

  •6.7k•31k•824•544•Updated Jan 3, 2026Jan 3, 2026

• redex

  Public

  facebook/redex’s past year of commit activity
  A bytecode optimizer for Android apps

  C++

  •

  MIT License

  •675•6.2k•56•16•Updated Jan 3, 2026Jan 3, 2026

• OpenBIC

  Public

  facebook/OpenBIC’s past year of commit activity
  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

  •52•59•5•21•Updated Jan 3, 2026Jan 3, 2026

• 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

  •53•59•1•1•Updated Jan 3, 2026Jan 3, 2026

• memlab

  Public

  facebook/memlab’s past year of commit activity
  A framework for finding JavaScript memory leaks and analyzing heap snapshots

  nodejsjavascriptperformance+ 10facebookv8memorysnapshotdetectore2eheap+ 3

  JavaScript

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  MIT License

  •131•4.6k•10•1•Updated Jan 2, 2026Jan 2, 2026

• 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•715•418•Updated Jan 2, 2026Jan 2, 2026

• metro

  Public

  facebook/metro’s past year of commit activity
  🚇 The JavaScript bundler for React Native

  javascriptbundlerreact-native

  JavaScript

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  MIT License

  •673•5.5k•357•61•Updated Jan 2, 2026Jan 2, 2026

• 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

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  MIT License

  •2.1k•23k•537•34•Updated Jan 2, 2026Jan 2, 2026