I'm aware of really good packages that handle each one individually: 1. Bug tracking: Trac, Mantis, JIRA, FogBugz 2. Agile Project Management: Version One, Pivotal Tracker 3. Client Collaboration: Basecamp, activeCollab
But I haven't seen anything out there that handles all three things very well.
We've been slowly building our own system over the past 3 years, but I'd like to know: Is there a definitive web app already out there that combines these three things nicely?