(Click Here) Setup your webcam as a Motion sensor and receive alerts via SMS

Well this is a really cool and simple trick to monitor any activity at a place eg. to keep an eye on the entry of your house. All you need to do is to is Download Yawcam ( its build in Java so make sure you have java installed) and setup your webcam at the point you need to monitor. For the details just click on the above link. Trust me it works, i've myself tried it.