CCM-IS4C is a project mainly written in ..., it's free.
The Clintonville Community Market Version of IS4C - Open Source Point of Sale System
This is a version of IS4C developed by Robb Ebright for the Clintonville Community Market. It is GPL software and the original version can be found at http://is4c.coop
This version contains modifications to Fannie developed by Joel Brock and is basically to act as a repository for development.