Koha

Koha is the first free and open source software library automation package (ILS). Koha’s feature set continues to evolve and expand to meet the needs of its user base.

Full-featured ILS. In use worldwide in libraries of all sizes, Koha is a true enterprise-class ILS with comprehensive functionality including basic or advanced options. Koha includes modules for circulation, cataloging, acquisitions, serials, reserves, patron management, branch relationships, and more.

Full text searching Koha uses an RDBMS coupled with an external search engine to provide powerful searching that is truly scalable

Library Standards Compliant. Koha is built using library standards and protocols that ensure interoperability between Koha and other systems and technologies, while supporting existing workflows and tools.

Web-based Interfaces. Koha’s OPAC, circ, management and self-checkout interfaces are all based on standards-compliant World Wide Web technologies–XHTML, CSS and Javascript–making Koha a truly platform-independent solution.

Free Software / Open Source. Koha is distributed under the Free Software General Public License (GPL) version 2 or later.

No Vendor Lock-in. It is an important part of the free software promise that there is no vendor lock-in: libraries are free to install and use Koha themselves if the have the in-house expertise or to purchase support or development services from the best available sources. Libraries should be free to change support company and export their data at any time, make sure your support company allows this.