What's a good photo editing program that will let me put multiple photos of multiple kinds on a sheet?

Answer 1

What you want is called a "Proof Sheet"

Use Windows Picture& Fax viewer to open one of the pictures, then hit the "printer" icon at the bottom to start up the Printer Wizard.

Select the pictures you want printed, then select the layout option that best suits you. There are several layouts to pick from, depending on how many pictures you are working with.