I'm looking for alternatives to view my source code repository and run metrics on it.
Have you looked at Review Board? It's an open source tool that is used on google code and is picking up some steam in general. I ended up not using it for my particular project because it didn't provide a user-friendly way to do post-commit reviews. I imagine the web interface has improved dramatically since I evaluated it last year.
If Review Board doesn't match your requirements, consider posting more detail on what your looking for so we can have a better chance of pointing you in the right direction