Ollert - Learn what your Trello boards aren't telling you
Google Open Source - All of Googles open source projects under a single umbrella
Vacation Tracker - The easiest way to track your team’s vacations and days off.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Punchtime - Nifty time tracking for Trello users and teams
Code NASA - 253 NASA open source software projects