Whatever you do, stay away from Borland Together. Someone in our IT department decided it was the standard tool we all had to use and it's an absolute pain - buggy and a pain to use.

I've used a few different ones. Currently we use Clearcase DIMS. It's a bit of a top-heavy app, but it works ok. We're transitioning to tracking defects via Quality Center. I can't say that I recommend doing that as so far it's been a mess to get setup and ported to. By far the easiest and simplest I've used is Mantis (http://www.mantisbt.org/[^]. It's simple to set up, easy to use, and if you have any php experience it's fairly easy to tweak.

I've heard that Rational Rose is really good. Whatever you do though, steer away from Borland Together. I've seen free, open source versions that were much better. Unfortunately, our IT department think they know better then we do what kind of programs we need and I've been forced to use the Borland garbage.