Twitter, Inc.

Pelikan is Twitter's unified cache backend

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

Twitter Text Libraries

Streaming MapReduce with Scalding and Storm

A fault tolerant, protocol-agnostic RPC system

A tool for benchmarking RPC services

A library to implement asynchronous dependency graphs for services in Java

Manages application of security headers with many safe defaults

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

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

A set of primitives for parallel computation in Torch

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

Wonderful reusable code from Twitter

Lessons in the Fundamentals of Scala

Cloudhopper Commons

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

Twitter Emoji for Everyone

A Scala API for Cascading

Korean tokenizer

Scala extensions for the Kryo serialization library

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

A Thrift parser/generator

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

Abstract Algebra for Scala

A compiler for the Mustache templating language

Typesafe activator template for constructing a Finatra Thrift server application: https://twitter.github.io/finatra/user-guide/ —

Typesafe activator template for constructing a Finatra HTTP server application:

Find potential bugs in your services with Diffy

Breakout Detection via Robust E-Statistics