Elegantt for Trello - The most elegant way to manage your Trello projects
Hillo - Board activity tracking for Trello
Hello Epics for Trello - Simplify your Trello board with parent/child relationships
Scrumpy - A simple, beautiful and agile project management software
TunnelVision - See your next Trello tasks every time you open a browser tab
CloudApp Trello Power-Up - Attach your CloudApp drops to your Trello cards on the fly!