jWildfire

jWildfire is so easy to use, it can generate random batches using specific variations as the primary option.  You can then edit the creation and come up with some amazing fractals.  Andreas Maschke is the developer who created jWildfire and who has taken over the development of Mandelbulb 3D.   Both apps are free! 

I cannot do any tutorials, as much as I love using jWildfire, there is a tremendous amount of things you can do with it, that I've never done (yet <grin>). 

There are several pages of fractals that I've designed.  I'm ordering them via color for now.  This may change in the future, who knows.