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SQL powered operating system instrumentation, monitoring, and analytics.

A desktop debugging platform for mobile developers.

🃏 Delightful JavaScript Testing.

Used to integrate iOS apps with Facebook Platform.

Facebook Open Switching System Software for controlling network switches.

Performant type-checking for python.

A framework for building native apps with React.

Adds static typing to JavaScript to improve developer productivity and code quality.

A virtual machine for executing programs written in Hack.

Facebook AI Performance Evaluation Platform

A React framework for building text editors.

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.

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

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

Easy to maintain open source documentation websites.

Distributed platform for building autonomic network functions.

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

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

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

Facebook ZeroMQ wrappers.

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

Facebook Ads API using Node.js

🚇 The JavaScript bundler for React Native.

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

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

Zstandard - Fast real-time compression algorithm

A JavaScript bundle optimizer.