A developer known as “mathew” has released SnowSaver, a freeware snowflake screen saver for OS X. SnowSaver is “modeled on the pretty falling snowflakes animation that Apple has been running on an iMac in the window of the local Apple store. (Theirs is actually a QuickTime movie, and not available to customers. People have asked.)”
Pretty nifty, and despite mathew’s development pains, really shows the power of OpenGL. Well worth the effort, mathew!