Hillo - Board activity tracking for Trello
Scrumpy - A simple, beautiful and agile project management software
Paws for Trello - The best way to use Trello on your desktop
Chpokify - Planning Poker Tool that saves time of sprint estimation. Agile teams management tools. Jira Integration (Import/Export), auto-summary, smart voting management.
Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
CloudApp Trello Power-Up - Attach your CloudApp drops to your Trello cards on the fly!