Here is a Particle simulator I made.
The simulator is supposed to simulate dry sand with 0 wind.
Use space to 'pause' it. (It only stays paused while you hold down space.)
Use the left mouse button to draw Green particles (you can only draw to the right of where you clicked.)
Use the right mouse button as an eraser (you can only erase to the right of where you clicked.)
Use 1, 2, and 3 (in that order,) to erase all.
Details:
This simulator is rendered on to a canvas,
There are only 3 actors used in the simulator,
view, canvas, and cright.
(for any more details, please let me know.)
Enjoy!