Ollert - Learn what your Trello boards aren't telling you
Scrum for Trello - Adds functionality to Trello boards for your Scrum projects.
Vacation Tracker - The easiest way to track your team’s vacations and days off.
Ora - Welcome to your team’s command center. A place to track projects. Tasks. Time. Commits. Status Reports. Your entire product or business! It's the fastest-growing productivity suite your team needs right now!
Punchtime - Nifty time tracking for Trello users and teams
TargetProcess - Agile Project Management Web Application