This is from the creator of Spangfract....wow,thanks Luc for your compliments. I just wanted to correct a little typo of Luc's. The current version is 1.8Bbeta, not 2.8Bbeta. I am currently working on cleaning up version 1.95 which is much easier to use and has more features,fewer bugs. Quick note, I am not using OS X, so it's a "classic" Mac program. It is free,though and should run fine on Mac OS 8 thru 9.22. I've been reluctant to do the documentation since it's been changing so much as I've learned more about the math/programming. These URLs are for Stuffit versions of the program itself. http://home.cinci.rr.com/fractalman/Programs/SpangFract1.8Bbeta.sit http://groups.yahoo.com/group/Spangfract/files/SpangFract1.8Bbeta.sit