Algodoo

Triton, Proteus and Nereid orbiting Neptune. Yes, scaled distances exist here and Triton orbits Clockwise. Anyway, If you wanna see Proteus, select Neptune and Triton to find a small spring in between. Zoom in to find Proteus. If you wanna find Nereid, click a tiny bit northwest from Triton to find another small spring. Keep moving the screen until you reach the end of the spring. Zoom into the end of the spring to find Nereid. Enjoy!