Open Source at Twitter

Working with and contributing to the open source community

Open Source Projects
Twitter engineers use, contribute to and release a lot of open source software. We are thankful to work with a variety of projects and communities.
Community
Twitter supports a number of open source organizations and communities with contributions or official membership.
Contributors
We are thankful to everyone who has contributed to our projects.

Featured Projects

cascading

Cascading is a Java application framework that enables typical developers to quickly and easily develop rich Data Analytics and Data...

hadoop

The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of...

hRaven

hRaven collects run time data and statistics from map reduce jobs running on Hadoop clusters and stores the collected job history in an...

Algebird

Abstract algebra for Scala. This code is targeted at building aggregation systems (via Scalding or Storm). It was originally developed...

Scalding

Scalding is a Scala library that makes it easy to specify Hadoop MapReduce jobs. Scalding is built on top of Cascading, a Java library...

mysql

MySQL is the persistent storage technology behind most Twitter data: the interest graph, timelines, user data and the Tweets themselves...

Scala School

Scala School started as a series of lectures at Twitter to prepare experienced...

twemcache

Twemcache (pronounced “two-em-cache”) is the Twitter Memcached. Twemcache is based on a fork of...

Twitter CLDR (Ruby)

A Ruby implementation of the ICU (International Components for Unicode) that uses the Common...

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Featured Contributors

Bill Farner
Bill Farner
@wfarner
(((Argyris Zymnis)))
(((Argyris Zymnis)))
@argyris
Sam Ritchie
Sam Ritchie
@sritchie
Doug Tangren
Doug Tangren
@softprops
Johan Oskarsson
Johan Oskarsson
@skr
marius eriksen
marius eriksen
@marius
Sangjin Lee
Sangjin Lee
@sjlee
Kalman Speier
Kalman Speier
@kalmanspeier
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Code of Conduct

Our Open Source Code of Conduct reflects the standards we hold ourselves within our open source projects and the communities we work with.
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Contributor's License Agreement

For certain Twitter open-source projects, Twitter requires you or your employer accept and submit a Contributors License Agreement (CLA) with Twitter. In order to address the intellectual property license granted with contributions, Twitter must have a CLA on file that has been submitted by each contributor. The CLA is designed for your protection as a contributor; it does not change your ownership of your contributions. By accepting the CLA, you represent that you have the rights needed to grant Twitter a license to the code.
Submit CLA
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