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    161 repositories

    • flow

      Public
      Adds static typing to JavaScript to improve developer productivity and code quality.
      OCaml
      •
      MIT License
      •1.9k•22k•604•14•Updated Feb 4, 2026Feb 4, 2026

    • immersive-web-sdk

      Public
      WebXR made simple. Full-featured framework with interactions, locomotion, and spatial UI. Powered by Three.js.
      TypeScript
      •
      MIT License
      •50•376•15•3•Updated Feb 4, 2026Feb 4, 2026

    • kuduraft

      Public
      A Raft Library in C++ based on the Raft implementation in Apache Kudu
      C++
      •
      Apache License 2.0
      •663•143•0•0•Updated Feb 4, 2026Feb 4, 2026

    • pyrefly

      Public
      A fast type checker and language server for Python
      pythonrusttypecheckertypeslanguage-serveridetypingcode-qualityhacktoberfesttypecheck
      Rust
      •
      MIT License
      •264•5.3k•372•60•Updated Feb 4, 2026Feb 4, 2026

    • openr

      Public
      Distributed platform for building autonomic network functions.
      C++
      •
      MIT License
      •246•927•10•10•Updated Feb 4, 2026Feb 4, 2026

    • hermes

      Public
      A JavaScript engine optimized for running React Native.
      JavaScript
      •
      MIT License
      •732•11k•119•58•Updated Feb 4, 2026Feb 4, 2026

    • hhvm

      Public
      A virtual machine for executing programs written in Hack.
      phphackhhvmhacklang
      C++
      •
      Other
      •3.1k•19k•409•115•Updated Feb 4, 2026Feb 4, 2026

    • fbthrift

      Public
      Facebook's branch of Apache Thrift, including a new C++ server.
      C++
      •
      Apache License 2.0
      •627•2.7k•44•6•Updated Feb 4, 2026Feb 4, 2026

    • fboss

      Public
      Facebook Open Switching System Software for controlling network switches.
      C++
      •
      Other
      •377•950•25•130•Updated Feb 4, 2026Feb 4, 2026

    • lexical

      Public
      Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance.
      TypeScript
      •
      MIT License
      •2.1k•23k•546•43•Updated Feb 4, 2026Feb 4, 2026

    • buck2

      Public
      Build system, successor to Buck
      Rust
      •
      Apache License 2.0
      •324•4.2k•274•68•Updated Feb 4, 2026Feb 4, 2026

    • starlark-rust

      Public
      A Rust implementation of the Starlark language
      Rust
      •
      Apache License 2.0
      •86•923•30•22•Updated Feb 4, 2026Feb 4, 2026

    • react

      Public
      The library for web and native user interfaces.
      reactjavascriptlibraryuifrontenddeclarative
      JavaScript
      •
      MIT License
      •51k•243k•819•298•Updated Feb 4, 2026Feb 4, 2026

    • redex

      Public
      A bytecode optimizer for Android apps
      C++
      •
      MIT License
      •681•6.3k•56•16•Updated Feb 4, 2026Feb 4, 2026

    • react-native

      Public
      A framework for building native applications using React
      reactandroidiosmobilereact-nativecross-platformapp-frameworkmobile-development
      C++
      •
      MIT License
      •25k•125k•738•454•Updated Feb 4, 2026Feb 4, 2026

    • openbmc

      Public
      OpenBMC is an open software framework to build a complete Linux image for a Board Management Controller (BMC).
      C
      •
      Apache License 2.0
      •300•670•43•7•Updated Feb 4, 2026Feb 4, 2026

    • Ax

      Public
      Adaptive Experimentation Platform
      Python
      •
      MIT License
      •358•2.7k•37•132•Updated Feb 4, 2026Feb 4, 2026

    • watchman

      Public
      Watches files and records, or triggers actions, when they change.
      C++
      •
      MIT License
      •1.1k•13k•210•29•Updated Feb 4, 2026Feb 4, 2026

    • sapling

      Public
      A Scalable, User-Friendly Source Control System.
      Rust
      •
      GNU General Public License v2.0
      •337•6.7k•231•62•Updated Feb 4, 2026Feb 4, 2026

    • openzl

      Public
      A novel data compression framework
      C
      •
      Other
      •132•2.9k•37•37•Updated Feb 4, 2026Feb 4, 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
      •206•3.2k•4•6•Updated Feb 4, 2026Feb 4, 2026

    • ThreatExchange

      Public
      Trust & Safety tools for working together to fight digital harms.
      hashingimagevideoperceptual-hashingimage-hashingvideo-hashingimage-similaritythreatexchangencmecvideo-similarity
      C++
      •
      Other
      •347•1.3k•57•6•Updated Feb 4, 2026Feb 4, 2026

    • Rapid

      Public
      The OpenStreetMap editor driven by open data, AI, and supercharged features
      JavaScript
      •
      ISC License
      •118•613•293•10•Updated Feb 4, 2026Feb 4, 2026

    • 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 communit…
      PHP
      •
      GNU General Public License v2.0
      •180•249•82•137•Updated Feb 3, 2026Feb 3, 2026

    • rocksdb

      Public
      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•835•562•Updated Feb 3, 2026Feb 3, 2026

    • relay

      Public
      Relay is a JavaScript framework for building data-driven React applications.
      Rust
      •
      MIT License
      •1.9k•19k•621•184•Updated Feb 3, 2026Feb 3, 2026

    • facebook-business-sdk-codegen

      Public
      Codegen project for our business SDKs
      PHP
      •
      Other
      •62•106•11•19•Updated Feb 3, 2026Feb 3, 2026

    • facebook-ruby-business-sdk

      Public
      Ruby SDK for Meta Marketing API
      Ruby
      •
      Other
      •168•216•26•14•Updated Feb 3, 2026Feb 3, 2026

    • stylex

      Public
      StyleX is the styling system for ambitious user interfaces.
      JavaScript
      •
      MIT License
      •386•9.1k•93•25•Updated Feb 3, 2026Feb 3, 2026

    • folly

      Public
      An open-source C++ library developed and used at Facebook.
      C++
      •
      Apache License 2.0
      •5.8k•30k•313•135•Updated Feb 3, 2026Feb 3, 2026