SyntaxDB - Easily look up programming syntax for multiple languages
Droopy - Droopy is a mini Web server whose sole purpose is to let others upload files to your computer.
GitHub Visualizer - Enter user/repo and see the project visually
Learn Anything - Search Interactive Maps to Learn Anything
Gource - Gource is a software version control visualization tool.
Brainscape - Find, create, and study SMART FLASHCARDS on any device. DOUBLE your learning speed using the most effective study system on the planet. Keep all your content in sync across Brainscape's website and your Android devices.