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    161 repositories

    • hhvm

      Public
      A virtual machine for executing programs written in Hack.
      phphackhhvmhacklang
      C++
      •
      Other
      •3.1k•19k•409•113•Updated Jan 24, 2026Jan 24, 2026

    • fboss

      Public
      Facebook Open Switching System Software for controlling network switches.
      C++
      •
      Other
      •374•946•25•108•Updated Jan 24, 2026Jan 24, 2026

    • buck2

      Public
      Build system, successor to Buck
      Rust
      •
      Apache License 2.0
      •323•4.2k•273•63•Updated Jan 24, 2026Jan 24, 2026

    • buck2-prelude

      Public
      Prelude for the Buck2 project
      Starlark
      •
      Apache License 2.0
      •59•59•1•2•Updated Jan 24, 2026Jan 24, 2026

    • pyrefly

      Public
      A fast type checker and language server for Python
      pythonrusttypecheckertypeslanguage-serveridetypingcode-qualityhacktoberfesttypecheck
      Rust
      •
      MIT License
      •259•5.2k•365•43•Updated Jan 24, 2026Jan 24, 2026

    • folly

      Public
      An open-source C++ library developed and used at Facebook.
      C++
      •
      Apache License 2.0
      •5.8k•30k•309•130•Updated Jan 24, 2026Jan 24, 2026

    • starlark-rust

      Public
      A Rust implementation of the Starlark language
      Rust
      •
      Apache License 2.0
      •83•920•30•21•Updated Jan 24, 2026Jan 24, 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
      •301•670•43•7•Updated Jan 24, 2026Jan 24, 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 community.
      PHP
      •
      GNU General Public License v2.0
      •179•246•79•135•Updated Jan 24, 2026Jan 24, 2026

    • fbthrift

      Public
      Facebook's branch of Apache Thrift, including a new C++ server.
      C++
      •
      Apache License 2.0
      •626•2.7k•44•5•Updated Jan 24, 2026Jan 24, 2026

    • mariana-trench

      Public
      A security focused static analysis tool for Android and Java applications.
      C++
      •
      MIT License
      •156•1.2k•39•4•Updated Jan 24, 2026Jan 24, 2026

    • openr

      Public
      Distributed platform for building autonomic network functions.
      C++
      •
      MIT License
      •245•926•10•10•Updated Jan 24, 2026Jan 24, 2026

    • squangle

      Public
      SQuangLe is a C++ API for accessing MySQL servers
      C++
      •
      Other
      •54•126•2•0•Updated Jan 24, 2026Jan 24, 2026

    • redex

      Public
      A bytecode optimizer for Android apps
      C++
      •
      MIT License
      •681•6.3k•56•16•Updated Jan 24, 2026Jan 24, 2026

    • react

      Public
      The library for web and native user interfaces.
      reactjavascriptlibraryuifrontenddeclarative
      JavaScript
      •
      MIT License
      •50k•242k•842•298•Updated Jan 24, 2026Jan 24, 2026

    • OpenBIC

      Public
      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
      •54•62•5•3•Updated Jan 24, 2026Jan 24, 2026

    • Ax

      Public
      Adaptive Experimentation Platform
      Python
      •
      MIT License
      •358•2.7k•32•140•Updated Jan 24, 2026Jan 24, 2026

    • hermes

      Public
      A JavaScript engine optimized for running React Native.
      JavaScript
      •
      MIT License
      •730•11k•121•53•Updated Jan 23, 2026Jan 23, 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•827•555•Updated Jan 23, 2026Jan 23, 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 graphics APIs (e.g. OpenGL, Metal and Vulkan).
      C++
      •
      Other
      •206•3.2k•4•5•Updated Jan 23, 2026Jan 23, 2026

    • CacheLib

      Public
      Pluggable in-process caching engine to build and scale high performance services
      performancecppcacheconcurrencyssdcache-engine
      C++
      •
      Apache License 2.0
      •314•1.5k•15•27•Updated Jan 23, 2026Jan 23, 2026

    • voprf

      Public
      An implementation of a verifiable oblivious pseudorandom function (RFC 9497)
      Rust
      •
      Apache License 2.0
      •18•76•2•6•Updated Jan 23, 2026Jan 23, 2026

    • sapling

      Public
      A Scalable, User-Friendly Source Control System.
      Rust
      •
      GNU General Public License v2.0
      •336•6.7k•229•66•Updated Jan 23, 2026Jan 23, 2026

    • pyre-check

      Public
      Performant type-checking for python.
      pythonsecuritytypecheckerstatic-analysisocamlcontrol-flow-analysiscode-qualityprogram-analysistaint-analysisabstract-interpretation
      OCaml
      •
      MIT License
      •451•7.1k•131•20•Updated Jan 23, 2026Jan 23, 2026

    • opaque-ke

      Public
      An implementation of the OPAQUE password-authenticated key exchange protocol
      Rust
      •
      Apache License 2.0
      •59•371•0•5•Updated Jan 23, 2026Jan 23, 2026

    • openzl

      Public
      A novel data compression framework
      C
      •
      Other
      •131•2.9k•35•28•Updated Jan 23, 2026Jan 23, 2026

    • relay

      Public
      Relay is a JavaScript framework for building data-driven React applications.
      Rust
      •
      MIT License
      •1.9k•19k•620•180•Updated Jan 23, 2026Jan 23, 2026

    • netconsd

      Public
      Receive and process logs from the Linux kernel.
      C
      •
      BSD 3-Clause "New" or "Revised" License
      •23•60•0•1•Updated Jan 23, 2026Jan 23, 2026

    • mvfst

      Public
      An implementation of the QUIC transport protocol.
      C++
      •
      MIT License
      •278•1.6k•39•8•Updated Jan 23, 2026Jan 23, 2026

    • flow

      Public
      Adds static typing to JavaScript to improve developer productivity and code quality.
      OCaml
      •
      MIT License
      •1.9k•22k•604•14•Updated Jan 23, 2026Jan 23, 2026