This collection of stunning fractals are available in a number of versions for different OSs and older computers. Additionally, they all are highly configurable; so, for instance, you could adjust the framerate to slow a screensaver down for an older graphics card; or you could increase or decrease the number and speed of the objects onscreen.
The author does not state what he means by "older computers" -- I take it the newest versions would not run too good on my old 386 with 1 mg RAM and a 16 hz processor.
They do require the OpenAL runtime environment, which is included in the zip file. This is an older version that will not run the Skyrocket screensaver. A link to the OpenAL website is available on the mainpage. This is not an upgrade scam: OpenAL is open source and therefore totally free forever.
The OpenAL is so Vista compatible that when an updated version came available, Vista (Home Premium 32 bit) let me know that solutions are available for my problem with the Skyrocket screensaver. (Vista has a long memory. I tried that screensaver months ago and forgot about it.)
Installation is a matter of unzipping the compressed files and letting Windows know where they are. The author suggest putting them in the directory where Windows stores its screensavers but I do not know where that is in Vista. I placed them in my videos directory, then opened Windows' screesaver loader via the desktop and browsed over to my videos directory and ran each screensaver individually so as to let Windows add them to its list of available screensavers. To uninstall, just delete the individual screensavers.
The author does mention some problems with Intel processors. I have always used AMD. I have not as yet downloaded the new AL to run Skyrocket, but all the other screensavers produce stunning graphics effects on my HP Slimline with dual core AMD 3800 and 1 gig of RAM.