Twitter, Inc.

Heron is a realtime, distributed, fault-tolerant stream processing engine from Twitter

Wonderful reusable code from Twitter

Twitter Text Libraries

A Thrift parser/generator

A fault tolerant, protocol-agnostic RPC system

A Scala API for Cascading

Manages application of security headers with many safe defaults

Twitter Kit for Android

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

Placing labels on a timeline without overlap.

Fast, testable, Scala services built on Twitter-Server and Finagle

GraphJet is a real-time graph processing library.

Twitter common libraries for python and the JVM

Twitter Emoji for Everyone

A tool for benchmarking RPC services

Streaming MapReduce with Scalding and Storm

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

A compiler for the Mustache templating language

Lessons in the Fundamentals of Scala

Twitter's collection of LZO and Protocol Buffer-related Hadoop, Pig, Hive, and HBase code.

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

typeahead.js is a fast and fully-featured autocomplete library

A set of primitives for parallel computation in Torch

A high performance replicated log service. (The development is moved to Apache Incubator)

Pelikan is Twitter's unified cache backend

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

Visualize your HDFS cluster usage

The Twitter OSS Project Builder

Typesafe activator template for constructing a Finatra HTTP server application: