Smarter Wallpaper is a free application by Smarter Apps that allows BlackBerry users to set up a customizable rotation of wallpaper images. Users choose the series of images including custom folders to change automatically as frequently as every minute.
MMMOOO have an ongoing project creating BlackBerry Screensavers which let users play animations or get useful information about their BlackBerry. Currently, they offer My Battery, Any Time and Aquarium, and they now have iGallery. iGallery lets you play a photo slideshow on your BlackBerry, turning your smartphone into a digital photo frame. This app is definitely one for visiting Granny, or showing off pictures to family. Best of all, the app is free.