CodeFlower - CodeFlower visualizes source code repositories using an interactive tree.
GitHub Visualizer - Enter user/repo and see the project visually
SyntaxDB - Easily look up programming syntax for multiple languages
Github Profile Visualizer - Tool for visualizing GitHub profiles
The GitHub Matrix Screensaver - Latest commits from GitHub visualized Matrix-style
Typing Club - Learn touch typing online using TypingClub's free typing courses. It includes 650 typing games, typing tests and videos.