I use Hydrogen with the colombo acoustic drum kit to slap up some drums, export them to wav, and then import the wav into an audacity project for recording/mixing.
It might not be the best sound on earth, but for something quick and free, I like it.
Here's an example:
http://vinterkrig.org/opptak/testing...r_slagverk.wav
Something quick made for doing a norther cover once.