You can win a Xiaomi Mijia Action Camera! I compared the similar priced YI Lite and Xiaomi Mijia incl. EIS Comparison, Audio Test and Specs.
MGCOOL Explorer 3 was just released offering Image Stabilisation in 4K resolution, a 2" Touchscreen and .h264+ video codec.
YI Lite Action Camera has similar specs compared to original YI camera (Xiaomi YI, YI 2K), but within YI 4K body incl. LCD touch screen and image stabilisation!
Feiyu SPG is a versatile gimbal that works with Smartphones and Action Cameras. It is splash proof and offers 360° rotation.