Peter writes: "OpenBiblio  is an easy to use, open source, automated library system written in PHP containing OPAC, circulation, cataloging, and staff administration functionality. The purpose of this project is to provide a cost effective library automation solution for private collections, clubs, churches, schools, or public libraries. Version 0.5.1 has just been released. Predominately a bugfix release, addressing a number of security, compatibility, and i18n problems. Minor feature enhancements have been added including: enhanced reporting functionality w/CSV output and links for biblios and members in HTML report results; 'New Like' functionality, giving the user the ability to create a biblio record based on existing an existing record.
View the release notes  for more info, or download the release here ."