Algodoo

No longer a beta, this car carrier designed for the Chevrolet Cobalt (made by lucidliquid) has a chain and wheel car loading system, enhanced performance, and enhanced suspension.
There are two decks for storing cars. You can use the car elevator to take the car up to the first or second deck using i and k. i is up, k is down.
WSAD to drive the truck. Arrow keys to drive the cobalt I put into the scene (I DIDN'T MAKE THE COBALT, LUCIDLIQUID DID!). F to drop trailer!