Roland Quast points me to Compiere the ERP / CRM System that is an open source ERP suite.
One thing that I personally found interesting about it was the accounting side of it.
Many of the concepts in this package are core to how you should build a system that deals with workflow and accounting (most ecom sites).
Roland calls it probably one of the best opensource ecom packages he has seen on the net so far.
Commercially the compiere system is implemented by over 60+ Partners worldwide. As an international part of the Compiere eco-system, partners are independent Application Solution Providers (ASP), Application Solution Vendors
Value Added Resellers (VAR) , System Integrators, System Implementers and of course Consultants
Compiere is based on Oracle, but I've seen Codaf as another rdbms option.
Some resources on Compiere:
Recent comments
13 weeks 6 days ago
14 weeks 1 day ago
16 weeks 12 hours ago
16 weeks 6 days ago
17 weeks 18 hours ago
25 weeks 6 days ago
25 weeks 6 days ago
26 weeks 1 day ago
26 weeks 2 days ago
27 weeks 1 day ago