Loan Spread Calculator Pro - description from Softdepia.com:
Loan Spread Calculator Pro automatically displays financial answers on a 2-dimension grid as you enter or update loan variables. You may easily view grids of loan amounts, interest rates, terms in months, or payment amounts based upon your loan variables. Provides the ability to easily calculate loan scenarios based upon variable payment frequency.
Loan Spread Calculator Pro is a "Free to try" program. You can download and try it for an evaluation period.