This page contains some scripts that I've found useful for various things.
A jpeg thumbnail index html page script. Uses Imagemagick convert to create thumbnails and then generates an html page of the thumbnails and links to the images.
A LaTeX Makefile. It will build more than one LaTeX files in a directory with a common BibTeX bibliography. You may also want to look at this Makefile as well.
A Jukebox shell script. Will recursively search a directory for mp3 files and randomly play a specified number (default 10). Uses mpg123 commandline player.