pepper is a commandline tool for retrieving statistics and generating reports from source code repositories. It ships with several graphical and textual reports, and is easily extensible using the Lua scripting language. It includes support for multiple version control systems, including Git and Subversion.
Git Manager is a Web interface for Git. It allows you to manage and create Git repositories, users, and access groups. It is based on Apache authentication mechanisms (HTTP or LDAP) and uses a MySQL database to store repo/user/group relation data. The ViewGit repository viewer is included.