Adia
http://adia.tech/The iPhone of Drones
Adia is the first and only drone development platform. It has multiple sensors (cameras, IMU, ultrasonic) and a library of fully-prepared building blocks, such as 3d mapping, stereo object tracking, etc. With this product you should be able to make basic drone applications in 5 lines of python.
Angel list: https://angel.co/company/adia-3