KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
Gitstalk - Discover what your favorite GitHub users are up to
CheatKeys - View Windows keyboard shortcuts in the current application.
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.
CodeMyUI - Handpicked code snippets you can use in your web projects