Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Methodist.io - Methodist provides free online agile services for distributed agile teams. Planning poker & Retrospective online boards.
Chpokify - Planning Poker Tool that saves time of sprint estimation. Agile teams management tools. Jira Integration (Import/Export), auto-summary, smart voting management.
rerail.io - Remote Sprint Planning Poker Tool
Scrum Planning Poker Cards Online - Online deck of cards for Scrum Poker Planning sessions.