Paws for Trello - The best way to use Trello on your desktop
Collabtive - Collabtive is a web-based project management software.
Elegantt for Trello - The most elegant way to manage your Trello projects
Teamwork - The Project Management App for Professionals. The most powerful and simple way to collaborate with your team.
TunnelVision - See your next Trello tasks every time you open a browser tab
Flyspray - The bug killer!