Omeka is an open source web publishing platform for creating and sharing digital collections and digital exhibits. It was first launched in 2007 at the Roy Rosenzweig Center for History and New Media (RRCHNM) and has become one of the most popular DH tools for digital exhibits available. Because it is open source, Omeka is customizable and has a sizable developer community who contribute new plugins and themes on a regular basis. But you can also keep things simple, which makes Omeka a useful tool both for classroom assignments and for more long-term digital exhibits.
There are three versions of Omeka available: