3. EaseEASE (Enhanced AI Scoring Engine) is a library that allows for machine learning based classification of textual content. This is useful for tasks such as scoring student essays.
6. EcommerceService for managing edX's product catalog and handling orders for those products
14. I18n ToolsTools to help with internationalization and localization of Open edX projects
15. ConfigurationA collection of edx configuration scripts and utilities that edx.org uses to deploy openedx.
17. XblockXBlock courseware component architecture
18. DevstackGet up and running quickly to develop or extend Open edX services