TinyCat - The online catalog and integrated library system for tiny libraries, powered by LibraryThing.
Alma - Meet Alma, a modern and affordable integrated student information system (SIS) and learning...
Koha - Koha is the first free and open source software library automation package (ILS).
Follett Destiny Library Manager - Follett Destiny Library Manager is a complete library management system that can be accessed from anywhere.
DSpace - DSpace open source software enables open sharing of content that spans organizations, continents...
Sierra ILS - Sierra is designed to make your library effective.