Solus has no fractal rendering software in its repos. I would suggest this as one of the better ones.
Site Extract :
What is Gnofract 4D?
Gnofract 4D is a free, open source program which allows anyone to create beautiful images called fractals. The images are automatically created by the computer based on mathematical principles. These include the Mandelbrot and Julia sets and many more. You don't need to do any math: you can explore a universe of images just using a mouse. It runs on Unix-based systems such as Linux and FreeBSD and can also be run on Mac OS X.
easy to use, with a polished, modern UI very fast, with high-performance multi-threaded rendering flexible, with an unlimited number of fractal functions and vast numbers of options widely used, with over 125,000 downloads to date