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

fatcache

fatcache is memcache on SSD. Think of fatcache as a cache for your big data.

hogan.js

Hogan.js is a compiler for the Mustache templating language

CocoaSPDY

SPDY for iOS and OS X. See our blog post for more information....

Flight

Flight is a lightweight, component-based, event-driven JavaScript framework that maps behavior to DOM nodes. It was created at Twitter,...

Bower

Bower is a package manager for the web originally created at Twitter and adopted by a large community.

It offers a generic, un-...

mysql

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

hadoop

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

Bijection

A Bijection is an invertible function that converts back and forth between two types, with the contract that a round-trip through the...

Mesos

Apache Mesos is a cluster manager that provides efficient resource isolation and sharing across distributed applications, or frameworks...

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Featured Contributors

Chris Aniszczyk
Chris Aniszczyk
@cra
Reed Loden
Reed Loden
@reedloden
Moses Nakamura
Moses Nakamura
@mnnakamura
Ximing Yu
Ximing Yu
@ximyu
Ryan LeCompte
Ryan LeCompte
@ryanlecompte
Wen-Hao Lue
Wen-Hao Lue
@wlue
Jeff Hodges
Jeff Hodges
@jmhodges
Glen D Sanford
Glen D Sanford
@9len
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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.
Learn More

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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