Simple fluid dynamics sketch, based on Real-time Fluid Dynamics for Games (http://www.dgp.toronto.edu/people/stam/reality/Research/pdf/GDC03.pdf) and plasmapong.com.<br><br>
Left mouse button - click and drag to stir fluid<br>
Right mouse button or shift key and left mouse button - click and drag to add density
More info at phagor.com