I've always wondered what makes these things work so many repetitive bits that build into something that is the same as the smaller bits it's like looking at the universe from the outside and truly seeing it for the first time. What an amazing thing to contemplate.
I'd love to try my hand doing fractals but unfortunately. I'm in the process of trying to pay for a new camera and getting an updated paintshop version so I'm stretched a bit thin these days. Maybe later.
This one is free and fairly easy to learn. [link] It also makes some awesome fractals. Most of the ones I use are freeware. Apophysis is free, but complicated to learn. [link] Most of the programs I use were either free or gifts from friends.