PlanITpoker - PlanITpoker is a cool on-line planning poker app that helps Agile project teams estimate projects easily.
Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Preceden - Preceden makes it easy to build simple, powerful timelines
Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.