No, this is not a spam post. A friend of mine created his own mortgage calculator and it’s pretty neat. All hail the Loan Bot!
Loan-Bot is a graphical mortgage analyzer and comparison tool.
In addition to basic mortgage calculations and amortization tables, Loan Bot can also graphically illustrate the effect that changing loan parameters has. You can save your mortgage parameters to return to later, or save several and compare them in a chart or in graphs.