Ægir – presentation day one
Ægir is a drupal install combined with several modules and drush that helps installing new drupal sites, maintaining existing ones, backs up and rolls back to earlier version of a site. With Ægir you can package a certain site buildup with modules and themes, and reproduce it as often as you need it. It provides you a web gui to do all these tasks, so there is little knowledge needed beyond structural knowledge of "what happens if I click this button".
The biggest hold-up for me is that you need full root access to the webserver, which I don't have. But it would certainly make things a lot easier. If we could develop and package a good solution for libraries in Norway, we could make it easily reproducable and accessible to other norwegian libraries.