Quantiacs - Earn money by creating trading algorithms in your spare time
GitHub Visualizer - Enter user/repo and see the project visually
CodeAnalogies - Visual explanations of web development topics
State.of.dev - Visualizing the current state of development
Algorithmia - Algorithmia makes applications smarter, by building a community around algorithm development, where state of the art algorithms are always live and accessible to anyone.
Anima App - Design, get feedback, convert to code, publish, iterate.