The state-of-the-art in Fractal Music software.  Has a very intuitive user interface, easy to use yet capable of creating quite complex works.  Using up to 16 instruments at a time, there are many parameters which can be changed through the "mandelbrot browser" windows, a bar laboratory where any and all parameters can be changed at any particular bar (0 - 128) of music.  Also features midi file merging, looping wave facility, chording, arpeggios,  and image processing whereby RBG values of an image are converted into fractal music parameters.  Projects are saved as *.gin files and midi files can be exported.  Shareware can be downloaded, but  the registered version is preferable.