2Flyer ScreenSaver Builder is a free program that lets you create your own screensavers from your own images, videos, songs, etc. You can join together up to 1000 images of any type and create your screensavers from them!
2Flyer ScreenSaver Builder also supports any usual format: JPG, JPEG, GIF, BMP, WMF or EMF (images and photos), MP3, WMA, WAV or MID (sounds and songs), and also includes more than 290 transition effects among the sequences, so the final result will be as compact as possible and the collection will offer the look you want.
Finally, the program lets you create a runnable (.EXE) file, in addition to the traditional .SCR to be able to share your creations with friends.