Omeka is a free, open source content management system for online digital collections.
A lightweight solution in comparison to traditional institutional repository software like DSpace and Fedora, Omeka has a focus on display and uses an unqualified Dublin Core metadata standard.
Example for a workflow using Omeka
Dublin Core is a small set of vocabulary terms that can be used to describe digital resources (video, images, web pages, etc.), as well as physical resources such as books or CDs, and objects like artworks.
The original DCMES Version 1.1 consists of 15 metadata elements: