You can watch your house or children when you aren?t there? You need no movement detector. Falco Watcher, via your webcam, registers, and saves in an AVI file, all movements that take place, so you can later view them in any video player. It is very simple to use, as you just adjust a series of parameters to your taste, like: continuous recording or only on movement detection. You also have the option to select the recording time interval. In other words, you can select the start and finish days as well.

Free software download I found at http://www.xentrik.net/software/falco_watcher.html

and home security camera where i purchased and got a very good service was
http://www.1800securitycamera.com/