phpcoin

A free software package originally designed for web-hosting resellers to handle clients, orders, invoices, notes and helpdesk, but no longer limited to hosting resellers.

Homepage: http://www.phpcoin.com
Disk Space: 5.7 MB
Documentation: http://docs.phpcoin.com/index.php?title=Main_Page
Support Forum: http://forums.phpcoin.com/