Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
Nifty - Manage projects, work, and communications in one place.
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
UpDiagram - Free agile project management tool for scrum team
Planning poker online - Poker pointing made simple for distributed teams
Hubstaff Tasks - Automated task management and time tracking