PlanITpoker - PlanITpoker is a cool on-line planning poker app that helps Agile project teams estimate projects easily.
productboard - Beautiful and powerful product management.
Taiga - Project management platform for agile developers & designers
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.
Craft.io - All-in-one product management software for entire product lifecycle
ProductPlan - Cloud-based product roadmap software solution