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

Bower

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

It offers a generic, un-...

Mesos

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

hogan.js

Hogan.js is a compiler for the Mustache templating language

recess

A simple and attractive code quality tool for CSS built on top of LESS.

Parquet

Parquet is a columnar storage format that supports nested data. Parquet metadata is encoded using Apache Thrift. We created Parquet to...

mysql

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

Summingbird

Summingbird is a library that lets you write MapReduce programs that look like native Scala or Java collection transformations and...

hadoop

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

Scrooge

Scrooge is a Thrift code generator written in Scala, which currently generates code for Scala and Java.

It’s meant to be a...

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Featured Contributors

Jeff Pinner
Jeff Pinner
@jpinner
Haidar Hadi
Haidar Hadi
@CruncherBigData
Ashutosh Singhal
Ashutosh Singhal
@daashu
Johan Oskarsson
Johan Oskarsson
@skr
Jerry Xu
Jerry Xu
@jerryxu
Ruben Oanta
Ruben Oanta
@rubeydoo
Jeff Hodges
Jeff Hodges
@jmhodges
Brad Dunbar
Brad Dunbar
@braddunbar
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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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