Nifty - Manage projects, work, and communications in one place.

Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).

Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

Firepoker - Agile Planning Poker powered by Firebase and AngularJS

Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.

Planning poker online - Poker pointing made simple for distributed teams