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• hhvm

  A virtual machine for executing programs written in Hack.

  php hack hhvm hacklang
  C++ 2,915 16,537 839 42 Updated May 14, 2020

• buck

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

  android python java ios buck build-tool
  Java Apache-2.0 1,098 7,350 213 15 Updated May 14, 2020

• infer

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

  c java objective-c cpp static-code-analysis static-analysis code-quality
  OCaml MIT 1,492 10,876 226 (14 issues need help) 2 Updated May 14, 2020

• react

  A declarative, efficient, and flexible JavaScript library for building user interfaces.

  react javascript library ui frontend declarative
  JavaScript MIT 28,811 148,618 494 (2 issues need help) 102 Updated May 14, 2020

• fbthrift

  Facebook's branch of Apache Thrift, including a new C++ server.
  C++ Apache-2.0 468 1,909 23 2 Updated May 14, 2020

• yoga

  Yoga is a cross-platform layout engine which implements Flexbox. Follow https://twitter.com/yogalayout for updates.
  C++ 1,058 13,146 198 65 Updated May 14, 2020

• react-native-website

  The site and docs for React Native

  react react-native docusaurus
  JavaScript 2,867 1,105 116 (11 issues need help) 17 Updated May 14, 2020

• openbmc

  OpenBMC is an open software framework to build a complete Linux image for a Board Management Controller (BMC).
  C 201 463 31 1 Updated May 14, 2020

• componentkit

  A React-inspired view framework for iOS.
  Objective-C++ 572 5,296 12 (2 issues need help) 6 Updated May 14, 2020

• relay

  Relay is a JavaScript framework for building data-driven React applications.
  JavaScript MIT 1,435 14,486 190 (5 issues need help) 35 Updated May 14, 2020

• react-native

  A framework for building native apps with React.
  JavaScript 19,394 87,176 743 (29 issues need help) 104 Updated May 14, 2020

• pyre-check

  Performant type-checking for python.

  python security typechecker static-analysis ocaml control-flow-analysis code-quality
  OCaml MIT 184 3,362 44 4 Updated May 14, 2020

• rocksdb

  A library that provides an embeddable, persistent key-value store for fast storage.
  C++ 3,754 16,615 345 151 Updated May 14, 2020

• facebook-ios-sdk

  Used to integrate the Facebook Platform with your iOS & tvOS apps.
  Objective-C 2,620 6,366 13 9 Updated May 14, 2020

• instant-articles-builder

  Instant Articles Rules Editor

  editor facebook instant-articles
  JavaScript 40 82 24 (3 issues need help) 9 Updated May 14, 2020

• docusaurus

  Easy to maintain open source documentation websites.

  react javascript open-source website documentation
  JavaScript 1,791 16,855 112 (23 issues need help) 28 Updated May 14, 2020

• flow

  Adds static typing to JavaScript to improve developer productivity and code quality.
  OCaml MIT 1,755 20,604 2,416 (18 issues need help) 133 Updated May 14, 2020

• litho

  A declarative framework for building efficient UIs on Android.
  Java Apache-2.0 606 6,689 60 13 Updated May 14, 2020

• draft-js

  A React framework for building text editors.
  JavaScript 2,018 18,031 606 (37 issues need help) 72 Updated May 14, 2020

• metro

  🚇 The JavaScript bundler for React Native.

  javascript bundler react-native
  JavaScript MIT 427 3,616 163 13 Updated May 14, 2020

• fresco

  An Android library for managing images and the memory they use.
  Java MIT 3,729 16,158 104 (40 issues need help) 12 Updated May 14, 2020

• jest

  Delightful JavaScript Testing.

  javascript testing facebook snapshot expectation easy painless-javascript-testing
  TypeScript MIT 4,376 30,933 924 (114 issues need help) 104 Updated May 14, 2020

• flipper

  A desktop debugging platform for mobile developers.
  TypeScript MIT 425 7,027 52 (7 issues need help) 3 Updated May 14, 2020

• facebook-python-business-sdk

  An SDK built to facilitate application development for Facebook Ads API.
  Python 467 735 0 33 Updated May 14, 2020

• mysql-5.6

  Facebook's branch of the Oracle MySQL v5.6 database. This includes MyRocks.
  C++ GPL-2.0 582 1,830 149 29 Updated May 14, 2020

• fboss

  Facebook Open Switching System Software for controlling network switches.
  C++ 194 617 12 10 Updated May 14, 2020

• Haxl

  A Haskell library that simplifies access to remote data, such as databases or web-based services.
  Haskell BSD-3-Clause 302 3,768 3 5 Updated May 14, 2020

• zstd

  Zstandard - Fast real-time compression algorithm
  C 1,117 11,979 28 (5 issues need help) 7 Updated May 14, 2020

• openr

  Distributed platform for building autonomic network functions.
  C++ 184 715 2 0 Updated May 14, 2020

• proxygen

  A collection of C++ HTTP libraries including an easy to use HTTP server.
  C++ 1,291 6,637 32 (1 issue needs help) 8 Updated May 14, 2020