KADOS is a full post-it web-based tool for SCRUM or Agile projects
Multi-project management, web-based Project Management suite.
Agile + Pomodoro Time Management Freeware
web based Scrum tool, customizable, feature rich and easy to use
Open Source, tasks, bug tracking, agile scrum, timesheet, wiki
The scalable open source tool for lean and agile project management
Open Vistual Project Manager
SCRUM project management
Estimate software development effort with 5 different methods