EasyCalc is component for creating realtime calculators of any type. For example if you need to explain your customers how many time / money / gray hairs atc. they save by using your product / service, let them count it for their situation.
Rich Snippets for VirtueMart
This awesome Joomla plugin adds structured data (also called Rich Snippets or meta information) about your VirtueMart products. It generates this automatically from the actual products. The best benefit is that Google can display some of these information right in the search results.