Happy TB303 contains information about TB-303, TR-808 and TR-909, along with patterns for sequencing 808, 909 & 303 sounds:
In my periodic Newsletter you can get a variety of examples (patterns).
I have combined a lot of information about the following VST-Plugins.
You can use our pattern in your Sequencer (Internal mode or via MIDI-Files).
via a comment on an earlier post