Freeware Programs: Algorithmic Arts
BankStep 2.1 Software emulation of hardware bank sequencers found in the big analog synthesizers, that produce control for the sound but not the sound itself. Instead of analog control voltages BankStep produces MIDI (and can make standard MIDI music files).
Bio2MIDI 2.1 Bio2Midi converts the text of a DNA or protein sequence to a MIDI file, which you may immediately audition, or import into any MIDI sequencer for further compositional processing.
SoftStep MIDI Algorithmic Composer (Basic) v1.3 is a complete, MIDI step sequencer. Patterned after analog sequencers, the program provides a variety of fractal, chaos, probability, and numerical functions for music generatation.