SmallDevTools - Handy developer tools with a delightful interface
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.
whatdevsneed - This is whatdevsneed.
Punchtime - Nifty time tracking for Trello users and teams