The InvenSense MPU-6050 sensor contains an accelerometer and a gyroscope in a single chip. It is very accurate, this sensor is used in self balancing robots, drones, smartphones, etc. The sensor uses the I2C-bus to interface with microcontroller.
This is the LIDAR-Lite v3 Laser Rangefinder, a compact, high-performance optical distance measurement sensor from Garmin™. The LIDAR-Lite v3 is the ideal solution for drone, robot or unmanned vehicle applications.