Check out instacalc.com for some easy to use calculators that can be shared easily. I created two calculators to compare investment in a 401K plan with a company match versus investment with after-tax dollars in a tax-sheltered investment vehicle like a Roth IRA. These types of calculators may not be the best for agents communicating with consumers, but they are easy to do some quick yet sophisticated math in a very flexible format for sharing on the web.