This is an ALPHA release -- you have been warned. It will get much better soon. 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:

installgem install atrium --pre