Yodiz is a simple but comprehensive agile tool with visual boards for Sprints, Releases, Backlog, Epics and Issue management.

Assembla is the leading provider for SVN and Perforce hosting and has task management features built into it's platform.

Sandglaz's agile boards help you accomplish more with less stress.

RealtimeBoard is an online whiteboard created as a team collaboration and brainstorming tool for agile teams.