A site with a lot of things for musicians. There are some programs for Windows, including
At the time of writing, I have just looked briefly at it. Found that the search was good when I searched on drums.
Unfortunately I do not know what is free software and what that costs.
Now I will hunt out a good drum program for Windows 8.1.
I hope I will be better able to vary my guitar style if I only have drums as accompaniment.
http://www.audiomelody.com/