I tossed one Apophysis fractal into my gallery. It's nothing special, but shows what can be done with the program with little effort. I'm by no means an expert in the program, but it's sometimes fun to take it out and see what it does. Apophysis 2 is easy to use and has a low learning curve. Basically, you just load some parameters, or use a preset that others have created (many in freebies here), and let the system create a bunch of random patterns based on that set. Then you click one of the random names to see what it looks like. Other options allow tweaking the pattern (not too intutively, though, but you eventually start to figure out what does what) and fooling with gradients to change the color patterns.