Abigail Macfarlane released Autony, an AUv3 MIDI sequencer inspired by Brian Eno's philosophy of having unreliability introduced into his equipment. To that end, Autony has a Reliability knob that can affect its playback. This, and all of the other controls, can be modulated via MIDI automation.
Autony iTunes Description:AUv3 Midi sequence generator which generates musical evolving sequences that you can further automate or modulate via midi.
A clever algorithm creates a musical sequence which is output as a midi signal which can be used to drive a software synthesiser or a hardware device. Various settings allow the sequence to be constrained to scales and chords, transposed on the fly and also allowed to gently mutate giving an evolving sequence.
All the controls can be modulated or automated via midi.
Needs a AU host like AUM and generates no sound on its own.
"My solution has been to make the equipment unreliable in various ways." - Brian Eno