SparkFun RGB Light Sensor - ISL29125 checks the light intensity in different light spectrums.
Pulse sensor board with all features of an optical Pulse oximeter and heart rate sensor. Totally open source.
Camera shield has a high performance camera processor for your Arduino board.
VL53L0X is a Time of flight(ToF) ranging sensor with high precision ranging which can measure a distance of up to 2m.
RPLIDAR A2 is the latest addition to the LIDAR family that rotates 360 degrees with a range of 6m and scan at the rate of 10Hz.
This LIDAR-Lite is a distance measurement sensor from Garmin™. It is a light weight module with efficient power consumption.The scan range is at 40m.
Pulse sensor board with all features of a Pulse oximeter and totally open source.
Adafruit VEML6070 UV Index Sensor Breakout is a compact and easy to use and run.
RPLIDAR - 360 degree Laser Scanner Development Kit is a 2D scanner with a 6 meter range.
Sparkfun Line Follower Array is programmed to follow a said path either black or white using the inbuilt IR sensors.
This 5M pixel camera module is capable of capturing 2592 x 1944 active array video and images and connects directly to your pcDuino V3.
FLiR Dev Kit is an IR imager breakout with thermal imaging option.