FogBugz is a very thorough bug-tracking application and the flagship product of Fog Creek Software, owned and managed by Joel Spolsky, of the Joel on Software fame. Representing Happy Cog, I had the pleasure of helping the Fog Creek team redesign the FogBugz site.
All in all, I had a lot of fun with this project. Joel and crew basically gave me free reign, so the direction was fairly open. While they mentioned their “wish list” to me, they left the door wide open to ideas.
If you’re interested in some of the exposition for this project, Joel has a pretty extensive write-up on his own site.