Not just another CMS. The thing that caught my eye here was the built-in support for Dublin Core compliant metadata to organize and access the archived collections. One thing that was missing from the introductory pages was any mention of how well the platform scaled. Could you archive and distribute 45 petabytes of image data, for example?
Omeka is a free, flexible, and open source web-publishing platform for the display of library, museum, archives, and scholarly collections and exhibitions. Its “five-minute setup” makes launching an online exhibition as easy as launching a blog.