PlanITpoker - PlanITpoker is a cool on-line planning poker app that helps Agile project teams estimate projects easily.
Taiga - Project management platform for agile developers & designers
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Leantime - Lean project management for startups & small teams
Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
VivifyScrum - VivifyScrum is an agile project management tool. Scrum and Kanban boards to visualize your projects. Team management, Git Integrations, time management and invoicing available