( If not, it's an online music making tool. Great fun when you should be working
)http://www.audiotool.com/
Just select 'launch audiotool' in the top right hand corner to get going. It's got an 808, 909, 303, 3osc subtractive synth, Tenori on, efx and a kind of sampler thing. Was in its infancy last time I looked. Pretty cool.
