FractMus 2000 is a Win32 application that creates Fractal/Algorithmic music using mathematical algorithms from chaotic dynamics, fractals, number-theory and cellular automata. Its features include: full midi-file support, sixteen independent voices, complete control of midi parameters (instrumentation, voice dynamics, channels, etc), 12 note-generating algorithms, 15 predefined musical scales (with the possibility of creating user-defined ones), 11 predefined note durations (plus user-defined ones), melody manipulation support (inversion, etc), composition assistants (Composition Maker, Composition Randomizer, Transposer,) full online-documentation/help and more.