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hhvm

HHVM is an open-source virtual machine designed for executing programs written in Hack and PHP. HHVM uses a just-in-time (JIT) compilation approach to achieve superior performance while maintaining the flexibility that PHP developers are accustomed to.

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rocksdb

Embedded key-value store for fast storage

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warp

A fast preprocessor for C and C++

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JavaScript 5,655 666

react

React is a JavaScript library for building user interfaces. It's declarative, efficient, and extremely flexible. What's more, it works with the libraries and frameworks that you already know.

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phabricator

Open software engineering platform and fun adventure game

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Objective-C 1,373 101

origami

A Quartz Composer framework for the design community

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xhprof

XHProf is a function-level hierarchical profiler for PHP and has a simple HTML based user interface.

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flint

flint is an open-source lint program for C++ developed and used at Facebook.

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tornado

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.

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JavaScript 571 46

regenerator

Source transformer enabling ECMAScript 6 generator functions (yield) in JavaScript-of-today (ES5)

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Objective-C 2,734 238

xctool

xctool is a replacement for Apple's xcodebuild that makes it easier to build and test iOS and Mac projects.

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arcanist

Command line interface for Phabricator

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hive-dwrf

DWRF file format for Hive

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libphutil

A collection of PHP utility classes

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pfff

pfff is a set of tools and OCaml APIs to write static analysis, dynamic analysis, code visualizations, code navigations, or style-preserving source-to-source transformations such as refactorings on source code.

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nifty

Thrift on Netty

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Python 371 30

planout

PlanOut is a library and interpreter for designing online experiments.

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presto

Distributed SQL query engine for big data

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Objective-C 1,638 90

KVOController

Simple, modern, thread-safe key-value observing for iOS and OS X.

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watchman

watches files and takes action when they change

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