Mir - The purpose of Mir is to enable the development of user interfaces shells.
Reddit List - Tracking the top 5000 subreddits
Wayland - Wayland is intended as a simpler replacement for X, easier to develop and maintain.
Upvoted - A news publication by reddit
XQuartz - The XQuartz project is an open-source effort to develop a version of the X.
Mailbrew - Automated email digests from Twitter, Reddit, YouTube & more