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• react

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

  react javascript library ui flexible frontend declarative
  JavaScript MIT 33,369 166,186 514 (10 issues need help) 177 Updated Mar 31, 2021

• facebook-ios-sdk

  Used to integrate the Facebook Platform with your iOS & tvOS apps.
  Objective-C 2,784 6,679 68 11 Updated Mar 31, 2021

• hermes

  Hermes is a small and lightweight JavaScript engine optimized for running React Native on Android.
  C++ MIT 319 6,205 56 (1 issue needs help) 8 Updated Mar 31, 2021

• fboss

  Facebook Open Switching System Software for controlling network switches.
  C++ 230 681 14 14 Updated Mar 31, 2021

• flux

  Application Architecture for Building User Interfaces
  JavaScript 3,632 17,038 8 0 Updated Mar 31, 2021

• hhvm

  A virtual machine for executing programs written in Hack.

  php c-plus-plus hack hhvm bounty reporting-crashes proxygen
  C++ 2,929 16,879 584 45 Updated Mar 31, 2021

• flow

  Adds static typing to JavaScript to improve developer productivity and code quality.
  OCaml MIT 1,811 21,282 2,417 (16 issues need help) 137 Updated Mar 31, 2021

• rocksdb

  A library that provides an embeddable, persistent key-value store for fast storage.

  database storage-engine
  C++ 4,331 19,424 367 210 Updated Mar 31, 2021

• openr

  Distributed platform for building autonomic network functions.
  C++ 215 769 2 0 Updated Mar 31, 2021

• 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 1,158 7,807 168 9 Updated Mar 31, 2021

• pyre-check

  Performant type-checking for python.

  python security typechecker static-analysis ocaml control-flow-analysis code-quality
  OCaml MIT 320 5,231 56 10 Updated Mar 31, 2021

• Ax

  Adaptive Experimentation Platform
  Jupyter Notebook MIT 154 1,451 25 17 Updated Mar 31, 2021

• folly

  An open-source C++ library developed and used at Facebook.
  C++ Apache-2.0 3,860 16,533 246 54 Updated Mar 30, 2021

• redex

  A bytecode optimizer for Android apps
  C++ MIT 564 5,274 43 (2 issues need help) 6 Updated Mar 31, 2021

• FAI-PEP

  Facebook AI Performance Evaluation Platform
  Python Apache-2.0 73 327 9 9 Updated Mar 31, 2021

• proxygen

  A collection of C++ HTTP libraries including an easy to use HTTP server.
  C++ 1,347 7,092 25 8 Updated Mar 31, 2021

• fbthrift

  Facebook's branch of Apache Thrift, including a new C++ server.
  C++ Apache-2.0 520 2,111 30 5 Updated Mar 31, 2021

• zstd

  Zstandard - Fast real-time compression algorithm
  C 1,344 14,238 62 (10 issues need help) 12 Updated Mar 30, 2021

• react-native

  A framework for building native apps with React.
  JavaScript 20,649 94,420 1,258 (27 issues need help) 366 Updated Mar 31, 2021

• mysql-5.6

  Facebook's branch of the Oracle MySQL v5.6 database. This includes MyRocks.
  C++ GPL-2.0 643 2,004 157 18 Updated Mar 30, 2021

• watchman

  Watches files and records, or triggers actions, when they change.
  C++ Apache-2.0 795 9,918 96 14 Updated Mar 31, 2021

• stetho

  Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.
  Java MIT 1,128 12,188 57 (9 issues need help) 18 Updated Mar 30, 2021

• SoLoader

  Native code loader for Android
  Java Apache-2.0 142 904 33 1 Updated Mar 30, 2021

• litho

  A declarative framework for building efficient UIs on Android.
  Java Apache-2.0 665 7,095 69 26 Updated Mar 30, 2021

• fbt

  A JavaScript Internationalization Framework

  javascript i18n framework internationalization
  JavaScript MIT 141 3,542 19 2 Updated Mar 30, 2021

• openbmc-linux

  Linux kernel consumed by OpenBMC
  C 24 24 1 1 Updated Mar 30, 2021

• ThreatExchange

  Share threat information with vetted partners
  C++ 214 807 10 (4 issues need help) 2 Updated Mar 30, 2021

• duckling

  Language, engine, and tooling for expressing, testing, and evaluating composable language rules on input strings.
  Haskell 604 3,243 94 (16 issues need help) 13 Updated Mar 30, 2021

• infer

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

  c java objective-c cpp static-code-analysis static-analysis code-quality
  HTML MIT 1,647 12,180 280 (13 issues need help) 2 Updated Mar 31, 2021

• flipper

  A desktop debugging platform for mobile developers.
  TypeScript MIT 581 8,199 62 (6 issues need help) 9 Updated Mar 30, 2021