Apps similar to Enterprise include VuFind, which is free and open source. Other options are Blacklight, AquaBrowser and Primo. In total there are four Library Managers like Enterprise for Mac, Windows, Linux, the web and self-hosting.
VuFind is a library resource portal designed and developed for libraries by libraries. The goal of VuFind is to enable your users to search and browse through all of your librarys resources by replacing the traditional OPAC to include:
United States
Blacklight is a free and open source ruby-on-rails based discovery interface (a.k.a. “next-generation catalog”) especially optimized for heterogeneous collections. You can use it as a library catalog, as a front end for a digital repository, or as a single-search interface to...
A "discovery layer" that provides a fresh, modern interface for patrons of varied backgrounds to use independently. By providing a simple interface with a single search box, patrons are able to quickly find relevant results when they need them.
United States
Meeting user expectations for quick, easy, and effective searching and retrieval, this "discovery system" is a one-stop solution for the discovery and delivery of local and remote resources, such as books, journal articles, and digital objects.
Israel