Drumtrax
Drumtrax is a little programme which contains a library of drum rhythms in a variety of styles which can be imported directly via midi using your sequencer of choice. It's a little dated, but after trying to find Drumtrax on the web, it seems that the company who created it no longer exists and I have been unable to find anywhere offering the same disc.
So I thought I'd make it available to here on my site ;-)
If I'm mistaken and anyone wants to claim ownership of this programme and would thus like me to remove this link, please feel free to contact me and I'll do the necessary.
Until then, hope you budding composers and song-writers find this of some use. Just click on the image to get the library.