This is a list of known Fedora 4 implementations, including details on the application frameworks and content. Institution Repository Application Framework Use Cases Status Contact Art Institute of Chicago LAKE Custom Development Columbia University Academic Commons Hydra Development Penn State University ArchiveSphere Hydra Development Penn State University ScholarSphere Hydra Production University of California, San Diego Digital Collections Hydra Development University of New South Wales ResData Custom Development York University York University Digital Library Islandora Development