Here is a link to Multiwii and it's site --> http://www.multiwii.com/ Multiwii was really popular around 2011 to 2015. Ever since, their best board, the Crius SE, has been discontinued. I am really in need of a board that was made by them or can support their firmware linked here --> https://github.com/multiwii/multiwii-firmware
If you look at their config.h file, there is a list of boards the firmware supports. Now what makes this a challenge is that the board needs to support a quadcopter construction. It also needs to be AIO or all in one.
I am very new to drones so I am not great with specs. If the community has any alternatives to the board or any other great boards in mind, that would be very helpful!