First of all you're looking for a VSTi not a vst. vst's are just for effects and processing. You want a vsti (virtual instrument) to do drum work by way of manipulating samples? I would suggest Reason 4.0 or FL studio Rewired with Logic if that's what you're using. That way you can do a whole lot more than what a virtual sampler will allow i.e composing. I actually use VSTi's and Reason 4.0 Rewired. The NNXT in reason can't be beat as far as software samplers go IMO. The way you can manipulate several chops at one time with this joint is bananas!
But if you're not up on the Rewire game here's a few vsti's that are great for what I gather you want to do.
are there any similar vstis, but free
ive looked all over kvr, havent really found anything that does the job i want. which is to drag and drop samples to keys/pads, which can be triggered by midi
any ideas?