There are 2 repositories under ir-thermal-cameras topic.
MLX90640 Thermal Camera with Edge Detect Video Overlay, for Raspberry Pi
Portable Raspberry Pi AMG8833 IR Thermal Camera
Library for MLX90614.
The temperature sensor that I have used is MLX90614BAA. Please copy the library folder in the Arduino installation directory. Make sure you have copied the i2cmaster.h file.