There are a few of them out there...
2 types, 2 axis without left and right stability and 3 axis.
Here's an example of t a 3 axis gimbal: 3-Axis Brushless Gimbal Camera Mount with 32bit Storm32 Controller for Gopro 3 4 FPV Black £47.78 Free Shipping @GoodLuckBuy.com
They are not plug and...