My suggestions. Maybe some of these links could even be placed on the sidebar. Anyways:
An actual physical drum machine. This is the model I have. Pretty simple but no custom settings aside from tempo. 99 differerent beats including 2beat,3beat and 4 beat metronome
Free Jam Tracks. They have downloadable jam songs without bass/drums/ or guitar. They also include the chords and some tips on it. I'm not against this website but I feel most of it very I-IV-V rock.
One-Motion online Drum Machine. Many custom settings
Monkey Machine. . This one leaves a lot of room for custom beats, they also have an archive of saved drum beats saved from other users (Free).