The project home page includes a
screenshot, but you can also visit a project hosted on a
public facing installation
and can click around.
There are nice diff pages and you can also get a
The project is still very young, but looks promising.
GitPrep is written in Perl and it is very easy to install, even on a shared host. It can run
its own web server, use any web server supporting PSGI/Plack, and it can
even run in CGI mode for those shared hosts.