Facebook

Simple, fast & type safe code that leverages the JavaScript & OCaml ecosystems

SQL powered operating system instrumentation, monitoring, and analytics.

A Mac OS X library for managing and manipulating iOS Simulators

A collection of C++ HTTP libraries including an easy to use HTTP server.

Facebook's branch of Apache Thrift, including a new C++ server.

Wangle is a framework providing a set of common client/server abstractions for building services in a consistent, modular, and composable way.

Facebook ZeroMQ wrappers.

Fatal is a library for fast prototyping software in modern C++. It provides facilities to enhance the expressive power of C++. The library is heavily based on template meta-programming, while keeping the complexity under-the-hood.

An open-source C++ library developed and used at Facebook.

🃏 Delightful JavaScript Testing.

Integrate your iOS apps in Swift with Facebook Platform.

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

concurrency, collections, zookeeper, stats/analytics, config, testing, etc

Bistro is a flexible distributed scheduler, a high-performance framework supporting multiple paradigms while retaining ease of configuration, management, and monitoring.

A virtual machine for executing programs written in Hack.

Distributed platform for building autonomic network functions.

Relay is a JavaScript framework for building data-driven React applications.

A framework for building native apps with React.

Create React apps with no build configuration.

An extension that allows inspection of React component hierarchy in the Chrome and Firefox Developer Tools.

Yoga is a cross-platform layout engine which implements Flexbox. Follow https://twitter.com/yogalayout for updates.

A declarative framework for building efficient UIs on Android.

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

GraphQL is a query language and execution engine tied to any backend service.

Performant type-checking for python.

An SDK built to facilitate application development for Facebook Ads API.

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

The site and docs for React Native

A bytecode optimizer for Android apps