ScrumShark - Simple Agile Project Management

ScrumShark enables your teams to stay organized, even between multiple offices. Start a project, add some stories, and go! — or follow the Agile planning life-cycle by using Iterations, the Backlog, and features like the Front & Back burners. The production version is hosted in http://scrumshark.com/
Its features include:

• Burn-down charts
• Story validation criteria and tasks
• Story features (epics)
• Story points and business value
• Sprints
• Sprint back-burner
• Milestones
• Product backlog with priorities
• Fully online, collaborative workspace for teams
• Real-time progress and status
• Story comments and discussion
• Personal and project story-boards
• Project backlog search with filtering
• Direct bookmarks to any project/story
• Visual representation of progress