These calculators deal with many different loan situations. You'll probably never need any of them, but in case you're looking for something specific, and possibly uncommon, I've included these.(Some were created years ago, so the schedule may be different.)
Loan Calculator with Extra Payment Options
This is very similar to my regular loan calculator. However, instead of just being able to input extra monthly payments, you have the option to input extra quarterly, semiannual, annual or one time only payments -- and print out an amortization schedule.
Balloon Payment Calculator
With this balloon payment calculator you can get the monthly and balloon payment or just the balloon payment itself. It's also useful as a pay off calculator.
Weekly Payment Loan Calculator
...Pretty self explanatory...
Quarterly Payment Loan Calculator
...Pretty self explanatory...
Semi-annual Payment Loan Calculator
...Pretty self explanatory...
Annual Payment Loan Calculator
...Pretty self explanatory...
Fixed Principal Payment Loan Calculator
This Loan Calculator deals with a fixed principal payment and varying interest payment. Therefore, the payment is different (and decreases) each month. You can input 0 for the payment and fill in the rest of the fields and get a schedule of interest only payments.
3/1 ARM Calculator
The rate is fixed for a period of 3 years after which it becomes adjustable.
I've never been a big ARM (Adjustable Rate Mortgage) fan. However, I do appreciate their use - especially for those who are planning to move, refinance, or payoff their loan in a few years. This calculator can help you see the impact of an adjustable rate mortgage over the years. It's more of a planning calculator. Obviously, you don't know where rates are going to be in the future. My suggestion is to input the worst case scenario for your ARM.
5/1 ARM Calculator
The rate is fixed for a period of 5 years after which it becomes adjustable.
See explanation for 3/1 ARM above...