poldemo.zip (302K for Windows) 

Contains three interesting modules.  I couldn't get one of them to work on my PC, but the other two are pretty cool.

Mac Website 

This link claims to contain a bunch of Mac modules that I haven't seen before.  Being a Windows user, I'm unable to test them out, so let me know if these are any good or not worth mentioning.

Attention Mac OS 9 Users!

From what I understand, After Dark programs will no longer run under the newest versions of the Mac OS.  If you have this problem, check out this link that provides another screensaver program for Macs called "MacDim" that claims to be able to run AD modules on OS 9.  Thanks to David Shappirio
for letting me know about the problem and its solution.