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
TargetProcess - Agile Project Management Web Application
Craft.io - All-in-one product management software for entire product lifecycle
Plan.io - Planio makes web based project management and team collaboration more efficient and fun. It is the perfect platform for your projects, team members and clients.
icescrum - iceScrum is an open source scrum tool for agile software development.