Questions on Biweekly, Bimonthly and Weekly-Payment Mortgages

What Is a Biweekly Mortgage?
How Does a Biweekly Save on Interest Payments?
Can a Borrower Set Up Her Own Biweekly Plan?
What Are Other Ways of Reducing Interest Payments?

Are There Lenders Who Will Provide a Biweekly Without Charge?

What Is the Difference Between  Biweekly, Simple Interest Biweekly, and Bimonthly Payment Plans?

How Much Is Simple Interest Worth on a Biweekly?

Which Pays Off Sooner, a Biweekly or Adding the Equivalent Amount to the Monthly Payment?

Does a Weekly-Payment Mortgage Have Any Advantages to a Borrower?

How Do You Decide Between Using a Lender's Biweekly Program and Rolling Your Own?

MY QUESTION IS NOT HERE.  I WOULD LIKE TO LEAVE IT FOR THE PROFESSOR