Print multiple or all the images in a folder
In case you need to print many images at once (batch printing), e.g. when you have scanned images of a book, you can do it without using a special program.
Select all the images you want to print and go to File > Print, or even better just right-click and select Print.
Windows will pop up a wizard that will guide you to the process of printing all selected images at once in the printer you choose (even pdf virtual printers) with preferences valid for all images.
Here is a screenshot (Windows 7) showing three images ready to be printed. Notice that I have selected at the right sidebar for all of them to be printed on a single page.
If you still prefer a dedicated program for this task, try AlSee, a freeware picture viewer that supports multiple image printing.