aking your repositories available in a local intranet is pretty easy, but having a nice interface to interact with those repositories, making collaboration between teams easier, is not that simple. [...] There are other solutions available, but some are too hard to install or, again, hard on the eyes. I recently discovered GitList, a free and open source Git repository viewer. It's interface resembles GitHub a lot but aims to keep everything simple and clear.

He includes the basic installation steps you'll need to get it up and running - setting up the environment, downloading and configuring Gitlist to look at your repositories and pointing out that, since the LESS source is included in the download, you can customize it how you see fit.

GitList is an elegant and modern web interface for interacting with multiple git repositories. It allows you to browse repositories using your favorite browser, viewing files under different revisions, commit history, diffs. It also generates RSS feeds for each repository, allowing you to stay up-to-date with the latest changes anytime, anywhere. GitList was written in PHP, on top of the Silex microframework and powered by the Twig template engine. This means that GitList is easy to install and easy to customize. Also, the GitList gorgeous interface was made possible due to Bootstrap.

Since it's just a PHP-based application, installing it is as easy as cloning the source to a web-accessible directory and setting up a "config.ini" file with your settings. You can find out more about this project based on the popular Silex microframework on its GitHub page.