Maelstrom is the world's finest particle-system screen saver for Windows. It uses a fully realized three-dimensional graphics engine to evolve a wide variety of themes over time, producing visual effects that are absolutely stunning.
Simply select a checkbox, and all themes will be rendered in anaglyphic 3D mode. When you wear a pair of 3D glasses (mailed to all registered users free of charge) the objects will literally leap off the screen.