Hillo - Board activity tracking for Trello
Hello Epics for Trello - Simplify your Trello board with parent/child relationships
Paws for Trello - The best way to use Trello on your desktop
TunnelVision - See your next Trello tasks every time you open a browser tab
Scrumpy - A simple, beautiful and agile project management software
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.