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A bytecode optimizer for Android apps

Performant type-checking for python.

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

Zstandard - Fast real-time compression algorithm

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

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

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

Distributed platform for building autonomic network functions.

Watches files and records, or triggers actions, when they change.

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

Torch implementation of ResNet from http://arxiv.org/abs/1512.03385 and training scripts

A framework for building native apps with React.

A virtual machine for executing programs written in Hack.

A variety of utilities built and maintained by Facebook's Linux Kernel Team that we wish to share with the community.

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

Facebook Open Switching System Software for controlling network switches.

Set up a modern web app by running one command.

Easy to maintain open source documentation websites.

A declarative framework for building efficient UIs on Android.

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

Delightful JavaScript Testing.

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

A php client for webdriver.

A React-inspired view framework for iOS.

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

Instant Articles Rules Editor

Facebook's branch of the Oracle MySQL v5.6 database. This includes MyRocks.

Integrate your iOS apps in Swift with Facebook Platform.

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