Scrum as a project management methodology is cropping up in project management software. This methodology asks team members to compile a backlog of their tasks, and work on tasks during the sprint - a determined amount of time where progress is made on the project.
For more information on the Scrum methodology, see my article, "A Quick Scrum Tutorial" and Misty Faucheux' article "Scrum Methodology: Coordinating Teams to Produce Quality Products." ScrumDesk is just one of the software programs for project managers incorporating this methodology.