Twitter, Inc.

A fault tolerant, protocol-agnostic RPC system

A Scala API for Cascading

A listing of open source efforts at Twitter on GitHub

Twitter Text Libraries

Fast, testable, Scala services built on TwitterServer and Finagle

A fast, light-weight proxy for memcached and redis

Twitter common libraries for python and the JVM

A tool for benchmarking RPC services

Wonderful reusable code from Twitter

Scoot is infrastructure to make developer tools smaller, simpler, and more distributed.

Twitter-Server defines a template from which services at Twitter are built

Pelikan is Twitter's unified cache backend

A Thrift parser/generator

Storehaus is a library that makes it easy to work with asynchronous key value stores

Cache Commons

Streaming MapReduce with Scalding and Storm

Emoji for everyone. https://twemoji.twitter.com/

The Twitter OSS Project Builder

Twitter Image Pipeline is a robust and performant image loading and caching framework for iOS clients

Tools for creating repos based on open source standards and best practices

Experimental Scala compiler focused on compilation speed

OAuth-enabled curl for the Twitter API

Find potential bugs in your services with Diffy

A compiler for the Mustache templating language

Twitter Kit for Unity

Ruby implementation of the ICU (International Components for Unicode) that uses the Common Locale Data Repository to format dates, plurals, and more.

Light-weight, fast framework for object serialization in Java, with Android support.

GraphJet is a real-time graph processing library.

Scala extensions for the Kryo serialization library