Elegantt for Trello - The most elegant way to manage your Trello projects
Nullboard - Minimalist locally-stored kanban board / task list manager.
TunnelVision - See your next Trello tasks every time you open a browser tab
OpenHub for GitHub - Fast and concise, open-source GitHub client app.
Hello Epics for Trello - Simplify your Trello board with parent/child relationships
Huboard - HuBoard is built from the ground up using the GitHub public API.