ARSperl is an integration kit for Perl5 and Remedy ARSystem API. It provides a large subset of the functionality found in the ARS C API
https://github.com/jeffmurphy/ARSperl
OpenSiteSearch is the new Open Source version of OCLC's original java-based web application for building Z39.50 portals (i.e. virtual union catalogues). This project is specifically aimed at the library community.