Atrium is a Rails Engine for for creating collections in either a Blacklight or Hydra context. The full hydra stack includes: Blacklight, Fedora, Solr, active-fedora, solrizer, and om. The first use of the atrium name for a gem was by Hiten Parmar: https://github.com/hrp/atrium
Rick Johnson, Dan Brubaker Horst, Jeremy Friesen, and Banu Lakshminarayanan
gem 'atrium', '~> 0.0.1'