XaoS can display many different fractal types, including Mandelbrot, Barnsley, Newton, Phoenix, and many more. Fractals can be rendered using various coloring methods and planes for an almost endless variety of images. XaoS also supports switching between Julia and Mandelbrot sets for each formula.
XaoS includes many animated tutorials that make learning about fractals fun and easy. These tutorials are also a great introduction to all of XaoS's features.
XaoS is free software, licensed under the GPL. It was originally written by Thomas Marsh and Jan Hubicka, and it is currently maintained by Zoltan Kovacs. Countless other improvements have been contributed by volunteers around the world. Because it's free software, anyone can help improve XaoS.