Gomoku, implemented in Java.
A retooling of a game created by someone else and released as GPL2. It also uses Java.
The Incredible Virtual Machine
Build a machine out of flying pointers. To be posted.
In those 66 characters, I have a correct implementation of the strcat operation. Can you beat that?
This is a prototype for an improved way to do spreadsheets. A write-up and the software is to-be-posted.