Contribute to Wikimedia open source

Help build the Wikimedia ecosystem with open source software.

Learn how contributing works

Get the basics of how to contribute to MediaWiki and other Wikimedia open source projects.

Contribute by topic

Find ways to contribute, and connect with others with shared interests.

Contribute by programming language

Choose a project to contribute to based on programming language.

Search all projects

Search all Wikimedia open source software projects.