Freeside is an open-source billing and trouble
ticketing package for ISPs, VoIP, hosting,
service, and content providers, and other online
Pbooks is a PHP-based accounting and bookkeeping
system. It is designed for use by small business,
and uses the double-entry accounting model.
A PHP class to dynamically generate and validate HTML forms.
A media library management system for obsessive-compulsive music geeks.