My favourite screensaver, on any platform, and the first thing I install on any new Haiku computer. Spirilla draws funky organic shapes on the screen.
I did not write this screensaver. It is a relic from the BeOS era and it will definitely not run on a gcc4 build of Haiku (Runs fine on a hybrid build, though.). I just found this piece of freeware memorabilia from Lost Marble Software and am making it available unaltered. If it is yours and you object to this, let me know and I'll take it down.
Installation: move the screensaver to a screensaver directory
Pre-Package Management Haiku:
Package Management Haiku:
However, Spirilla is also available in the BeOS Screensaver collection, available from my repo.