ARB Bushranger X-jack
This is an interesting alternative to conventional jacks. It is essentially a balloon of sorts — a very strong one at that — that inflates using the exhaust gasses of your vehicle or with an air compressor. The jack has a lifting capacity of 4000kg, and provides 75cm of lift. All you need to do is place it under the vehicle, connect the hose to the exhaust pipe or fill it up with the compressor. It is specifically designed to keep the jack on the ground and prevent sinkage of the jack in difficult terrain like sand and mud. Not only is it useful for changing a tyre, but it can also lift a wheel out of a deep rut or out of mud, sand or snow. It negates the difficulties caused by traditional jacks of finding a stable surface to place it on and the right position so the jack is in proper contact with the vehicle.