Hacker News Stack - Focus on the really fresh and unread news in Hacker News.
GitHub Visualizer - Enter user/repo and see the project visually
Hacker Newsletter - Best of Hacker News in your inbox every Friday.
Gource - Gource is a software version control visualization tool.
Hacker News Front Page Explorer - A database of top ranking Hacker News front page posts
The GitHub Matrix Screensaver - Latest commits from GitHub visualized Matrix-style