Moolah

The settings are amusing in themselves. You can choose the currency type (U.S. dollars, say) or mix currencies. You can choose how the notes flutter (random rotation, top down, and so on) and how large they are. And you can choose how many fill your screen, in a range from "small change" to "a drug lord's plane exploded."

The 14-day trial version lets you choose between Australian and U.S. dollars, but once you register the screen saver for $5 you can add a wide range of currencies, including UK Pounds, Iraqi Dinars, and many more. Registering also removes the nag screens and the UselessCreations.com logos that appear in the corners.

--Kim Saccio-Kent