I am looking for a customizable flexible product based on SAP workflow
for AP invoice verification and approval.

I'd like to receive a comprehensive list of vendor companies and their products.
For each of the products, I'd like to get an indication if it has the
following features/characteristics:
- invoice matching, 
- statistics and reporting, 
- process monitoring, 
- role based permissions, 
- invoice image display (from document management systems linked to SAP),
- PO and non-PO invoices support,
- credit memo support,
- approval workflow templates,
- SOX compliance

A hint for the researcher: ebydos invoice cockpit is a product of the
kind I'm looking for, but I need the full list of the product vendors.