Hi. If you're looking for Quartz Composer compositions, try these:
Abstracted
Earthspin Bubbles 2
Earthspin v1d
Earthspin
Lines Dance 4
Lines Dance 1b
PlasmaFun 11
schmoo
Spun Stars
As ever, drop in ~/Library/Screen Savers/ then visit System Preferences > Desktop & Screen Saver to set it up. Enjoy!