PlanITpoker - PlanITpoker is a cool on-line planning poker app that helps Agile project teams estimate projects easily.
productboard - Beautiful and powerful product management.
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Nifty - Manage projects, work, and communications in one place.
Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
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.