Nov 23
Jared Tarbell’s Complexification.net offers plenty of beautiful Processing-based art – most can be run directly from Java applets and have source code included.
Sand Traveller (by Jared Tarbell)
Nov 06
Kindernoiser (yep, weird name) is a a 4096 byte demo of 3D julia sets. For comparison the HTML for this page is close to 30 KB.
Kindernoiser screenshot.
If you do not have a powerful graphics card, try the video linked to below.