I was recently introduced to a great new collection database that’s open-source and free to the public, called Collective Access.
The program is web-based, uses accepted data schemas like Dublin Core and VRA Core and is customizable. It also provides features needed by museums, including storage information and loan tracking. Users can also import data sets like ULAN or WorldCat.
Documentation is provided for setting up. There is also a wiki and a forum to assist those who need it. For a free, easy-to-install product, Collective Access seems like a really nice product!