HSSVSS is a high quality motion detecting surveillance system and its free!

Features:

• Full Screen Video from your digital USB camera
• Creates Time Stamped Security Images
• Motion Detection triggers image capture
• Time-Lapsed Photography mode triggers image capture
• Time and Date stamps images
• Creates Motion and Time-lapsed AVI movies.
• Twin Cam mode allows for two cameras.
• Email Surveillance reports
• Export images to your website with FTP
• TV Out Support
• USB compatible
• Excellent Target Zone Range
• Very easy to use

HSVSS has many more features, which are not listed here. You can even ask for a feature to be added.