I have recently discovered
Review Board, which is a great code review tool - free even for commercial use, powerful, yet easy to use. Back in 2008 I had already been in search for a review tool that would plug into Visual Studio and Team Foundation Server, but didn't find any good ones. Review board had already been around back then, I should have used it, even if there was no specific integration for TFS. I hear that
Visual Studio 2012 now provides a code review feature, which is nice, but this comes a little bit late...
