Rear View Mirror
Rear View Mirror is motion detection program that can work with any web camera and shows alerts with a pop-up or notification sound.
Open Source Solution
Discovered a gem of a software utility, it’s free and open source, 1 click install, use your webcam as security camera, you can record the screen, and if there is movement, it plays a sound. Now it’s not intricate as other apps out there, but it works fine and very easy to run and setup.