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    151 repositories

    • buck2

      Public
      Build system, successor to Buck
      Rust
      •
      Apache License 2.0
      •293•4.1k•255•26•Updated Sep 9, 2025Sep 9, 2025

    • fbthrift

      Public
      Facebook's branch of Apache Thrift, including a new C++ server.
      C++
      •
      Apache License 2.0
      •624•2.6k•39•4•Updated Sep 9, 2025Sep 9, 2025

    • capi-param-builder

      Public
      Conversions API parameter builder to help enhance the parameter qualities for Conversions API events
      Java
      •
      Other
      •2•0•1•0•Updated Sep 9, 2025Sep 9, 2025

    • hhvm

      Public
      A virtual machine for executing programs written in Hack.
      hacklangphphackhhvm
      C++
      •
      Other
      •3.1k•18k•408•93•Updated Sep 9, 2025Sep 9, 2025

    • sapling

      Public
      A Scalable, User-Friendly Source Control System.
      Rust
      •
      GNU General Public License v2.0
      •317•6.5k•219•37•Updated Sep 9, 2025Sep 9, 2025

    • relay

      Public
      Relay is a JavaScript framework for building data-driven React applications.
      Rust
      •
      MIT License
      •1.9k•19k•600•153•Updated Sep 9, 2025Sep 9, 2025

    • react

      Public
      The library for web and native user interfaces.
      reactjavascriptlibraryuifrontenddeclarative
      JavaScript
      •
      MIT License
      •49k•239k•814•232•Updated Sep 9, 2025Sep 9, 2025

    • buck2-prelude

      Public
      Prelude for the Buck2 project
      Starlark
      •
      Apache License 2.0
      •51•58•1•1•Updated Sep 8, 2025Sep 8, 2025

    • pyrefly

      Public
      A fast type checker and IDE for Python
      pythonrusttypecheckertypeslanguage-serveridetypingcode-qualitytypechecktype-checker
      Rust
      •
      MIT License
      •148•3.6k•282•8•Updated Sep 8, 2025Sep 8, 2025

    • hermes

      Public
      A JavaScript engine optimized for running React Native.
      C++
      •
      MIT License
      •707•10k•119•71•Updated Sep 8, 2025Sep 8, 2025

    • flow

      Public
      Adds static typing to JavaScript to improve developer productivity and code quality.
      OCaml
      •
      MIT License
      •1.9k•22k•623•14•Updated Sep 8, 2025Sep 8, 2025

    • ktfmt

      Public
      A program that reformats Kotlin source code to comply with the common community standard for Kotlin code conventions.
      Kotlin
      •
      Apache License 2.0
      •86•1.1k•39•1•Updated Sep 8, 2025Sep 8, 2025

    • rocksdb

      Public
      A library that provides an embeddable, persistent key-value store for fast storage.
      storage-enginedatabase
      C++
      •
      GNU General Public License v2.0
      •6.6k•30k•773•497•Updated Sep 8, 2025Sep 8, 2025

    • fboss

      Public
      Facebook Open Switching System Software for controlling network switches.
      C++
      •
      Other
      •355•919•24•31•Updated Sep 8, 2025Sep 8, 2025

    • Ax

      Public
      Adaptive Experimentation Platform
      Python
      •
      MIT License
      •346•2.6k•20•97•Updated Sep 8, 2025Sep 8, 2025

    • dns

      Public
      Collection of Meta's DNS Libraries
      Go
      •
      Apache License 2.0
      •30•281•4•1•Updated Sep 8, 2025Sep 8, 2025

    • opaque-ke

      Public
      An implementation of the OPAQUE password-authenticated key exchange protocol
      Rust
      •
      Apache License 2.0
      •51•344•1•2•Updated Sep 8, 2025Sep 8, 2025

    • facebook-java-business-sdk

      Public
      Java SDK for Meta Marketing APIs
      Java
      •
      Other
      •337•437•52•20•Updated Sep 8, 2025Sep 8, 2025

    • proxygen

      Public
      A collection of C++ HTTP libraries including an easy to use HTTP server.
      C++
      •
      Other
      •1.5k•8.3k•20•7•Updated Sep 8, 2025Sep 8, 2025

    • fresco

      Public
      An Android library for managing images and the memory they use.
      Java
      •
      MIT License
      •3.8k•17k•241•10•Updated Sep 8, 2025Sep 8, 2025

    • redex

      Public
      A bytecode optimizer for Android apps
      C++
      •
      MIT License
      •674•6.2k•56•17•Updated Sep 8, 2025Sep 8, 2025

    • react-native

      Public
      A framework for building native applications using React
      mobilecross-platformapp-frameworkmobile-developmentreactandroidiosreact-native
      C++
      •
      MIT License
      •25k•124k•660•325•Updated Sep 8, 2025Sep 8, 2025

    • facebook-for-woocommerce

      Public
      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
      •165•242•115•77•Updated Sep 8, 2025Sep 8, 2025

    • docusaurus

      Public
      Easy to maintain open source documentation websites.
      reactjavascriptopen-sourcewebsitedocumentationhacktoberfest
      TypeScript
      •
      MIT License
      •9.4k•62k•293•56•Updated Sep 8, 2025Sep 8, 2025

    • prophet

      Public
      Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear growth.
      pythonrforecasting
      Python
      •
      MIT License
      •4.6k•20k•446•6•Updated Sep 8, 2025Sep 8, 2025

    • watchman

      Public
      Watches files and records, or triggers actions, when they change.
      C++
      •
      MIT License
      •1k•13k•215•40•Updated Sep 8, 2025Sep 8, 2025

    • 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
      •547•3.1k•34•11•Updated Sep 8, 2025Sep 8, 2025

    • 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
      •60•84•6•11•Updated Sep 8, 2025Sep 8, 2025

    • folly

      Public
      An open-source C++ library developed and used at Facebook.
      C++
      •
      Apache License 2.0
      •5.8k•30k•296•105•Updated Sep 8, 2025Sep 8, 2025

    • mvfst

      Public
      An implementation of the QUIC transport protocol.
      C++
      •
      MIT License
      •272•1.6k•35•4•Updated Sep 8, 2025Sep 8, 2025