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.
USB Webcam can be easily plugged with a microphone , works best with Linux.
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.
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.