here are some (mostly) perl I've written:

iTunes Parser (src) - this parses your itunes library xml and dumps it into mysql.

iMunge (src) - a script to help extract itunes track info from poorly named songs (examples)

AIM Annoyer (src) - script to send lines of a file to someone on AIM with iChat.

MP3 Tagger (src) - Changes ID tags in your mp3 files enmasse

MP3 Sane-izer (src) - steps through mp3 files, prompting you for title, artist and album info.

Playlist Add (src) - this script takes a directory name and adds all the music files in the directory to itunes, into a playlist of the same name. it then removes the original files.

Slather (src) - An update of my flickr_wallpaper script. This can be used to download random images from flickr based on criteria set on the command line.

Migrate from gallery.php to Flickr (src) - Very simple Flickr::Upload perl script that you pass a directory to and it uploads the gallery.php originals to flickr, adding the pictures to a set and tagging them all.