CodeBrag – Code Reviews Made Fun and Functional
http://codebrag.com/

Codebrag is a simple code review tool that makes the process work for your team. Features include: a) dead-simple code review workflow; b) inline comments and “likes”; c) all discussions on code in one place (follow-ups); d) smart email notifications; and e) git and svn support (single branch at the moment. This will be added to Script Resources Subject Tracer™.