Twitter's open source website, identifying projects we've released, organizations we support, and the work we do to support open source.

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

Wonderful reusable code from Twitter

A fault tolerant, protocol-agnostic RPC system

A Thrift parser/generator

Reversible conversions between types

Scala extensions for the Kryo serialization library

Abstract Algebra for Scala

Python client for the Twitter 'search Tweets' and 'count Tweets' endpoints (v2/Labs/premium/enterprise). Now supports Twitter API v2 /recent and /all search endpoints.

Source code for Twitter's Recommendation Algorithm

Source code for Twitter's Recommendation Algorithm

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

Fast, testable, Scala services built on TwitterServer and Finagle

The Twitter OSS Project Builder

Twitter Text Libraries. This code is used at Twitter to tokenize and parse text to meet the expectations for what can be used on the platform.

Refactored version of code.google.com/hadoop-gpl-compression for hadoop 0.20

A simple library for identifying emoji entities within a string in order to render them as Twemoji.

A fast, light-weight proxy for memcached and redis

Twitter GitHub Organization-wide files

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

Static checks to aid with a healthy adoption of Compose

Pelikan is Twitter's unified cache backend

OAuth-enabled curl for the Twitter API

Access scipy optimizers from your favorite deep learning framework.

Bazel rules to resolve, fetch and manage 3rdparty JVM dependencies with support for multiple parallel versions of the same dependency. Powered by Coursier.

A Scala API for Cascading

Twitter Logging Service is a robust and performant logging framework for iOS clients

Focus aligns Git worktree content based on outlines of a repository's Bazel build graph. Focused repos are sparse, shallow, and thin and unlock markedly better performance in large repos.

A Github Action for running Dodo: The Twitter OSS Project Builder

Systems performance telemetry

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

ZooKeeper protocol analyzer and stats gathering daemon

HTTP library for Android (beta)

groupcache is a caching and cache-filling library, intended as a replacement for memcached in many cases.

A Java library for authenticating HTTP Requests using OAuth

Twitter's Effective Scala Guide

Performance modelling system for Distributed Stream Processing Systems (DSPS) such as Apache Heron and Apache Storm

Placing labels on a timeline without overlap.

Lessons in the Fundamentals of Scala

Automatically check repositories health and quality and build reports that help us understand the current state of Sauce Labs repositories

A Safe, Stateful Rules Language for Event Streams

A novel text visualization technique

Header Compression for HTTP/2

A compiler for the Mustache templating language

A library to implement asynchronous dependency graphs for services in Java

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

A load generator, built for engineers

Scoot is a distributed task runner, supporting both a proprietary API and Bazel's Remote Execution.

JavaScript implementation of the ICU (International Components for Unicode) that uses the Common Locale Data Repository to format dates, plurals, and more. Based on twitter-cldr-rb.

GraphJet is a real-time graph processing library.

A standalone, flexible API that provides a full-featured rich text editor for iOS applications.

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

A tool for benchmarking RPC services

GateKeeper is a service built to automate the manual steps involved in onboarding, offboarding, and lost asset scenarios.

A Java HTTP client for consuming Twitter's realtime Streaming API

The official Twitter plugin for WordPress. Embed Twitter content and grow your audience on Twitter.

A thrift encoding and decoding library for Swift

Streaming MapReduce with Scalding and Storm

hRaven collects run time data and statistics from MapReduce jobs in an easily queryable format

A collection of Twitter's anonymized production cache traces.

Twemcache is the Twitter Memcached

D3Kit is a set tools to speed D3 related project development

Twitter interactive visualization

Twitter Network Layer is a scalable and feature rich network layer built on top of NSURLSession for Apple platforms

Experimental Scala compiler focused on compilation speed

Vireo is a lightweight and versatile video processing library written in C++11

Cassovary is a simple big graph processing library for the JVM

Twitter's OpenSSL Configuration

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

Twitter's GPL Cooperation Commitment

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

Document Repository for Twitter's Curation Style Guide

Scala extensions for Storm

A C interface to watchman

A Thrift client wrapper that encapsulates some common failover behavior

Repository for Twitter Open Source Decks

Description of the process for how to commit, review, and release code to the Scalding OSS family (Scalding, Summingbird, Algebird, Bijection, Storehaus, etc)

Breakout Detection via Robust E-Statistics

Innovators Patent Agreement (IPA)

An Active Record Reputation System for Rails