Thanks to Dr. Owenson’s blog on developing the flight controller software – almost completely from scratch.
One of the best build list for DIY micro/nano-quad. This includes FC with or without radio receiver built in. A good frame list is also included with links to Banggood for purchase.
Neat way to fly a mulit-quad over BLE interface. No RC radio required. Check out the setup here
The DRL simulator is probably best FPV drone simulator in the market. Gets it from here and choose your favorite controller to pair with it. Go practice!
Powerpoint to various gyro drift compensation strategies. Very clear layout of the approaches.