I am using Ultrafractal for these peculiar ones. I have some other images done with Tierazon.
I am not aquinted with Apophysis yet, but I do know it is a free download on the net. Just type Apophysis into google browser and you will find it. Good luck!:0))!
UF= Ultrafractal, you can download it on the net . Just type Ultrafractal in google's browser and you will get there. You can get the trial version and with the tutorial in it you can get started.
Good Luck! And Thx for the comment on Florishing.:0))!