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

A framework for building native apps with React.

Distributed SQL query engine for big data

An open IDE for web and native mobile development, built on top of Atom

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

Mcrouter is a memcached protocol router for scaling memcached deployments.

A bytecode optimizer for Android apps

🃏 Delightful JavaScript Testing.

SQL powered operating system instrumentation, monitoring, and analytics.

screenshot-test-for-android is a library that can generate fast deterministic screenshots while running instrumentation tests in android.

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

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

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

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

fbtftp is Facebook's implementation of a dynamic TFTP server framework.

An Android library for managing images and the memory they use.

Platform to host Capture the Flag competitions

A Haskell library that simplifies access to remote data, such as databases or web-based services.

Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

makeitopen.com is a learning portal that begins with the F8 App tutorial series, and will hopefully expand to encompass lots of additional tutorials designed to connect our FB Open Source projects.

iOS library to help detecting retain cycles in runtime.

Chisel is a collection of LLDB commands to assist debugging iOS apps.

iOS library that helps tracking all allocated Objective-C objects

Warp speed Data Transfer (WDT) is an embeddedable library (and command line tool) aiming to transfer data between 2 systems as fast as possible over multiple TCP paths.

iOS tool that helps with profiling iOS Memory usage.

Remodel is a tool that helps iOS and OS X developers avoid repetitive code by generating Objective-C models that support coding, value comparison, and immutability.

The Grocery Delivery utility for managing cookbook uploads to distributed Chef backends.

Bolts is a collection of low-level libraries designed to make developing mobile apps easier.

Software to manage a chef-zero instance and use it to test changes on production servers.

An easy way to fine-tune, and adjust parameters for iOS apps in development.