Powersave Applet consists of a script, that does various tips and tricks from Intel's PowerTop and lesswatts.org to reduce power consumption while your laptop is on battery. There is also an applet that provides a nice status icon in Gnome or KDE.
A perl script that can change the GNOME background ("wallpaper") in real-time at user-defined intervals. It scans a list of user-defined directories for images with known file extensions, and selects one at random to display.
A Perl script that uses ImageMagick's "convert" to make thumbnails for images contained in a directory (recursively). It then generates HTML (or PHP) code for e/a image file and a Menu that links all images. Usefull for CD photo albums and for Websites