Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Refined GitHub - Browser extension that makes GitHub cleaner & more powerful
Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
Gitstalk - Discover what your favorite GitHub users are up to
Methodist.io - Methodist provides free online agile services for distributed agile teams. Planning poker & Retrospective online boards.
Board for Github - A webview based GitHub project app with native features