facebook

docusaurus

Web

Easy to maintain open source documentation websites.

rocksdb

Data

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

folly

Developer Tools

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

zstd

Developer Tools

Zstandard - Fast real-time compression algorithm

lexical

Web

Lexical is an extensible text editor framework that provides excellent reliability, accessibility and performance.

flow

Developer Tools

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

prophet

Developer Tools

Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear g

relay

Developer Tools

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

hhvm

Developer Tools

A virtual machine for executing programs written in Hack.

fresco

Mobile

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

infer

Developer Tools

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

watchman

Developer Tools

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

astryx

Web

An open source design system that's fully customizable and agent ready

hermes

Web

A JavaScript engine optimized for running React Native.

stylex

Web

StyleX is the styling system for ambitious user interfaces.

jscodeshift

Web

A JavaScript codemod toolkit.

chisel

Developer Tools

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

proxygen

Developer Tools

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

facebook-ios-sdk

Mobile

Used to integrate the Facebook Platform with your iOS & tvOS apps.

litho

Mobile

A declarative framework for building efficient UIs on Android.

sapling

Developer Tools

A Scalable, User-Friendly Source Control System.

pyrefly

Developer Tools

A fast type checker and language server for Python

facebook-android-sdk

Mobile

Used to integrate Android apps with Facebook Platform.

redex

Developer Tools

A bytecode optimizer for Android apps

componentkit

Developer Tools

A React-inspired view framework for iOS.

fishhook

Developer Tools

A library that enables dynamically rebinding symbols in Mach-O binaries running on iOS.

idb

Mobile

idb is a flexible command line interface for automating iOS simulators and devices

PathPicker

Developer Tools

PathPicker accepts a wide range of input -- output from git commands, grep results, searches -- pretty much anything. Af

memlab

Web

A framework for finding JavaScript memory leaks and analyzing heap snapshots