I've recently doing a bit of testing work with TRAC. I loved it's simplicity and ease of use (despite the setup process for a Windows box requiring a bit of tinkering with components I wasn't overly familiar with). However when comparing TRAC to Team Foundation Server at work, one of the features which worked very much in favor of TFS was it's direct integration in the IDE.
Well, VSTrac looks like the perfect counter to that argument.
Found via the Visual Studio Gallery.