zzPlasma3 is a free screensaver that features a more placid psychedelic plasma look compared to zzPlasma2.
zzPlasma3, like Javier Lechuga's screensavers, comes in a zip file as a .scr. Just right-click on zzPlasma3 and select "Install." The screensaver properties window will pop up to configure your settings; this particular screensaver includes the ability to change the scheme at a set time automatically. Additionally, if you are running dual monitors, the display is different on each screen.
If you like a little psychedelics during your downtime, then this groovy multicolored screensaver will be the ticket. Be sure to check the rest of the author's apps below.