114.milov.nl - a starry mouse-driven snowflake generator of sorts, made with Processing. Simply drag your mouse over the applet and watch the patterns form. (But don't stare at it for too long or you'll see it every second you close your eyes; believe me, I know.)

I'm so used to thinking in layers (dhtml mindset) that it's always a nice surprise to be able to move thousands of pixels around in a Java environment.