About FinKit
Financial calculator that solves all sorts of problems involving the time value of money. Provides 51 financial calculations:

- Assets: capitalized cost - classic and MACRS depreciation
- Bonds: bond book value, duration, price and yield - zero-coupon bond price and yield
- Dates: term date - date series - year fraction - time between dates
- Interest: interest between dates - compound interest factors
- Life: probability - pure endowment - whole life annuity - temporary life annuity - whole life insurance - temporary life insurance - temporary endowment insurance
- Loans & Leases: installment loan - rule of 78 - balloon payment loan - interest only loan - fixed principal loan - sinking fund loan - prepaid interest loan - extra principal payments - credit cards - equipment lease
- Many more features.

Read more: http://www.apple.com/downloads/macosx/business_finance/finkit.html