Algodoo

An extremely maneuverable biplane.

Controls:

Up/Down Arrow Keys - Rear elevator
Right Arrow Key - Propeller (thruster)
A/S/D - Taxi Controls

The thruster on the front was originally a fairly advanced propeller that actually used air to move, but it was far too laggy, even without the wings on, so I just put a thruster on instead.

It may become laggy when you turn the wings on, because there's quite a few pieces of "air", and each of those pieces of air has two or three collisions, so it might not work too well on a lower end computer.