http://en.wikipedia.org/wiki/Conway%27s_game_of_lifeOnce I downloaded
Processing, I had the urge to make something. So I made this.
You can place 'live' cells by clicking the black area and watch what happens. The double-bar button pauses the simulation, the arrow-button speeds up the simulation, the square button resets the simulation, and the checkered button randomly generates 'live' cells.
Edit: Fixed a crashing issue.
Edit 2: Added random generation button.