joshdick/gcr - GitHub
gcr shows all commits in a Git branch that haven't been merged upstream, as well as the files affected by those commits, then optionally performs an interactive diff.
Crew - Code review tool
Crew is a code review tool for git projects. It works with a simple API : you can easily integrate it in your workflow.
Crew is a standalone LAMP project. It is based on web common technologies(symfony 1.x, jQuery and LESS) : you can easily install it on your own server.
Crew is an open-source project. It is published under MIT license : you can use it Like A Boss !