PlanITpoker - PlanITpoker is a cool on-line planning poker app that helps Agile project teams estimate projects easily.
Subscription Payments by involve.me - Launch a subscription business in one day
Firepoker - Agile Planning Poker powered by Firebase and AngularJS
Chargebee - Chargebee lets you manage subscriptions and payments at scale, handle custom recurring billing scenarios, reduce subscription churn and simplify accounting.
Planning Poker - Open source implementation of planning poker game (collaborative online estimation/voting tool).
Quiken - All-in-one client and request management platform.