Sensr.net is a free online service which enables you to take your web camera and essentially transform it into a surveillance camera that you can remotely monitor from a web browser. Sensr.net is able to continuously monitor and archive a camera’s incoming photos. Plus, it can also detect motion and notify you of the detection motion via a text message or email. The service also offers the option to share the camera publicly, as well as to share it on Facebook, YouTube or Twitter. The service works best with a dedicated network camera that supports FTP, but with a little finagling it will work with just about any USB web camera or built-in web cam too. At the moment Sensr.net is free and promises to remain a free service, although they have plans to offer premium plans soon too.