I have developed, by myself, a complete software product, consisting of a Joomla! Extension: VM Affiliate.
VM Affiliate is a complete affiliate marketing solution designed to help online merchants that run their shops using VirtueMart (and of course, Joomla!™) increase their profits. Affiliate marketing has proven itself as one of today's best marketing methods, both online and offline. So, if you decide to give affiliate marketing a shot, and run your own affiliate program, VM Affiliate does just that.