Bill Simser describes Agilo as followed:

..."The tool looks great. It has all the basics you need in a tool to support your use of the Scrum process (daily stand-up, burndown charts, etc.). A nice feature is the ability to link items together. This also has the capability of copying information from parent to child. Being able to do this, you can create some useful relationships with tasks relating to features, features relating to iterations or sprints, and all of these rolling up to releases (or whatever way you want to organize your projects). A key thing missing from tracking tools is the ability to link these items together easily. This facilitates creating a dashboard view of the project so you know at a glance where things are. Not something easily accomplished with an Excel spreadsheet. An added bonus with Agilo for Scrum is the ability to navigate back and forth between the relationships..."