If you're one of the few people who can't get enough of the study of Optics or laser pointer simulations, you're in luck with the appropriately named Laser Pointer Simulator.
If you really don't care much about the study of light or prefer to use devices that actually fire out lasers, you should probably move on.
The app displays a laser pointer firing into a room and you can move it around to change the angle. You can change to a3D room and the color and length of the laser.
