Algodoo

A wormhole on a rope. Chaos.

In the green circle's script, "onCollide" is set to send anything it bumps into to a set of coordinates (marked with a green ring), and the attraction is set to maximum.

Separate collision layers prevent the wormhole from teleporting the walls themselves. While the wormhole is itself attracted to the contained objects and so will usually stick around, if flicked too far it will escape - hence the need for a rope.

(Dev name: teleport4)