Download Shape Collage
Shape Collage provides all the tools you need to create collages out of the digital images you have stored in your hard drive. This tool is capable to select a complete directory and display every single file inside of it. All you need to do is to drag with your mouse the elements you want to add to the slideshow and drop them in the main window of the application. It allows you to see a preview of the final result before you make any changes in your files. Also, it comes with a resizer, with which you can make your pictures fit on the screen.