Cocoa

GoogleSuggest - A little class and example project that is basically a client for google suggest. It isn't very well documented, but feel free to try it out. I kind of plan on adding it to SearchMagic at some point.

RealBASIC

Chemistry - A starter template for RB that has the periodic table. Doesn't do anything, but it could save you some time.

Applescript

SpellSpam - A nifty little idea I came up with to filter spam based on spelling. Just think about it, how many \/lagra message do you get a day?? If 10 percent of the message is spelled incorrectly, it is put into a folder. Works surprisingly well. Just have mail run this script on every message (can get slow...). Also, you need the XSpell scripting addition. Happy hunting.
Popularity - This is a script for iChatStatus that shows how many IMs and chats you are currently involved in.
Popularity + iTunes - This script has the functionality of the above script but also displays iTunes song info.
Popularity for Adium - This is the same script as above but for Adium.
GoogleSpell - This is an Adium plugin that replaces the wrapped word with the google spelling result. For example, if I typed in "I love Arnold /spell{Swartzeneger}!" it would actually send "I love Arnold Schwarzenegger!". Useful if you suck at spelling.