Open edX

This remains the largest global installation as of 2022, with over 3000 courses and 500,000 regular users.

[9] An Open edX marketplace also features partners that provide various services to community members running their own instances in multiple languages.

The Open edX server-side software is based on Python, with Django as the web application framework.

[13] Platform design and development have been co-designed with its community from early in the project's history.

[14] The community hosts an annual Open edX Conference, which rotates worldwide each year.