A web-based bug or issue tracker written using ASP.NET, C#, and SQL Server (SQL Server Express too). Probably has all the features you need. Easy to setup. Power and flexibility when you need it. Learn more at http://ifdefined.com/bugtrackernet.html
This is a pretty average bug tracker. It tracks bugs and lets you customize stuff but man it's ugly. And missing a ton of features. Just go look at other open source projects. Mantis BT makes this thing look like an ugly POS. I use it because I don't have an OS server to setup. I would almost consider joining the project just to help it stop sucking.