This got me thinking about all the Re's/Reason devices that do meet that criteria.
So far we have:
A-Series 1&2 Modular Synths
Complex 1 (thanks ab459, I dont own that one)
HazeMate noise(thanks ab459, go buy that one for me)
Murf Modrack noise
Thor(lfo 2 out and you could use lfo 2 to modulate it self for some interesting sounds)
Vk1(global just set gate to on)
Vk2 ( in the far right 'control' turn off EG2
and in the far lower left in the Poly window switch it to Modular thanks to "Reasonable man")
Wbl5515 dual triple loop osc
Effects(no incoming audio):
D1-RT line noise injector RE
Etch red(high resonance)
Feedback loops seem a little bit outside the scope of the criteria as they require more than just a direct device out.