http://www.joomlainlibrary.com/
From the site:
Joomla! is an award-winning, open source (Free!) Content Management System that helps you build and manage state-of-the-art websites and other powerful online applications.
Why Joomla In Libraries ?
Here you’ll find step-by-step tutorials, library-focused templates, extensions, and a community of support to get your website off the ground and running quickly and smoothly.