Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
Corrello - Dashboards for agile teams using Trello
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Elegantt for Trello - The most elegant way to manage your Trello projects
Planning poker online - Poker pointing made simple for distributed teams
Toby for Teams - Better bookmarks, now with collaboration baked in 🔖