Welcome to the Evergreen Integrated Library System (ILS). Evergreen is open-source software, and is maintained and developed by the Georgia Public Library Service for the use of the PINES program. Anyone can download, modify, and use the software free of charge. Also, anyone can contribute and help the Evergreen software development effort.
The project's webpage is currently http://www.open-ils.org.
There is also a developer's blog at http://www.open-ils.org/blog/.
If you're interested in subscribing to a mailing list http://www.open-ils.org/listserv.html.