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X (fka Twitter)

X is what's happening and what people are talking about right now. It's where news breaks and communities converge. And it's all powered by open source, made by a team of amazing humans.

Participating in the community

đź«‚ We aim to create a welcoming and inclusive community. Please note that X's open source projects are governed by our code of conduct.

Get in touch!

Learn more about what we're doing in open source at opensource.x.com. Interested in a career at X? Check out our opportunities on X Careers!

đź‘‹ @XEng

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  1. Emoji for everyone. https://twemoji.twitter.com/

    HTML 17.6k 1.9k

  2. A Scala API for Cascading

    Scala 3.5k 702

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

    Java 1k 107

  4. Systems performance telemetry

    Rust 1.6k 113

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

    SCSS 3.2k 833

Repositories

Showing 10 of 101 repositories

  • communitynotes Public

    Documentation and source code powering Twitter's Community Notes

    twitter/communitynotes’s past year of commit activity

  • twitter-server Public

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

    twitter/twitter-server’s past year of commit activity

    Scala

    1,606

    Apache-2.0

    268 3 1

    Updated Feb 13, 2026

  • finagle Public

    A fault tolerant, protocol-agnostic RPC system

    twitter/finagle’s past year of commit activity

  • twitter/twemoji’s past year of commit activity

  • twitter-cldr-rb Public

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

    twitter/twitter-cldr-rb’s past year of commit activity

    Ruby

    689

    Apache-2.0

    99 8 5

    Updated Dec 18, 2025

  • util Public

    Wonderful reusable code from Twitter

    twitter/util’s past year of commit activity

  • algebird Public

    Abstract Algebra for Scala

    twitter/algebird’s past year of commit activity

  • the-algorithm Public

    Source code for the X Recommendation Algorithm

    twitter/the-algorithm’s past year of commit activity

  • finatra Public

    Fast, testable, Scala services built on TwitterServer and Finagle

    twitter/finatra’s past year of commit activity

  • opensource-website Public

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

    twitter/opensource-website’s past year of commit activity