VisualCalc Custom Tools: http://www.visualcalc.com/products_cnstl_ct.htm
It used to be that an informative website was sufficient. Today, customers also expect to be able to interact with you via your website - quickly and intuitively. VisualCalc Custom Tools help you direct your customers to the right product for their needs. Attract them with an engaging and intuitive user interface. Guide them by asking relevant questions. Close the sale with an immediate call to action. Keep them coming back to see how changes in their circumstances affect their product needs.