1)   Free APR Calculator 4.5
Calculate Annual Percentage Rates with this Free Mortgage APR Calculator for Windows

 2)   ARM Mortgage Calculator 1.1
This interactive mortgage calculator gives you a thorough estimation of your mortgage costs, including the annual percentage rate. It works with adjustable rate mortgages, as well as fixed rate or interest-only mortgages.

 3)   MoneyToys APR Calculator 2.1.1
The MoneyToys APR Calculator for web sites gives your visitors an easy-to-use calculator which calculates annual percentage rates (APR). Easily installed with a few lines of HTML, this APR Calculator can be configured to match your web site.

 4)   APR Spread Calculator 3.2.0
DreamCalc Pro is a software application which provides a fully featured and convenient alternative to using a separate hand-held financial calculator when you are working on your PC. Because it is software, it runs alongside your other applications.