8bit Drums - Free (7.5/10)This one is somewhat lesser known, but actually delivers when it comes to creating customizable 8bit drum sounds.
-Actually generates its own sounds
-Sounds like 8bit drums
-Excessively large GUI
SKdrummer - Free (4/10)First of all, just let me say that if you grew up with a shitty little keyboard from the 80's, this VST will make you giggle like a little girl. If you didn't, this will just sound like tinny, lo-fi drum samples.
-Sounds like the drums from an SK-1
-+1 for nostalgia factor.
-Pitch and volume sliders
-Might as well just download a few samples if this doesn't bring back memories.
Toad - Free (5/10)This one has sounds that more of you will recognize, since it's based off sounds from the NES.
-Sounds like an NES.
-Some extra knobs.
-Little more than a glorified sample pack.