[alanfranzoni]

You didn't tell us what would you like to do with it. What is your problem? What kind of projects and team sizes are you working with?

Do you need an application, at all?

I would suggest you to devise a WORKFLOW that you like, and you build or choose a (probably small) app that fits your needs.

Personally, I rarely found PM problems (reporting, calculating effort spent vs remaining, record task completion) that require a lot more than a spreadsheet, but again, I don't know what you're trying to achieve.