Omeka S

Omeka S is a web‑based publishing system designed for universities, galleries, libraries, archives and museums to present digital cultural‑heritage collections. It lets institutions create a network of independently curated exhibits that share a common pool of items, media and metadata, and supports linking those items to the Semantic Web and open‑data portals such as DPLA. The platform runs on Linux with Apache, MySQL/MariaDB and PHP 8.1+, using libraries like Laminas, Doctrine 2 and EasyRdf, and it can generate thumbnails via ImageMagick.

The software is self‑hostable, free‑tier and open‑source under GPL‑3.0, with a stable release that can be installed from source or a zip archive. Administrators can manage multiple sites from a single installation, extend functionality through modules, and apply fully‑responsive themes to suit different screen sizes. Documentation and community support are provided through a user manual, forums and a GitHub repository.

Omeka S emphasizes modularity and interoperability, allowing users to describe items with DPLA‑ready templates, import and map resources, and customize the appearance and behavior of each site without requiring a subscription. It follows Laminas coding standards and a git‑flow development process, encouraging contributions from an active developer and user community.