Here you'll find a free downloadable application that, once installed inside your own Web browser (it works with FireFox and Internet Explorer), aims to keep you out of trouble or, to be precise, stop you from clicking through to websites where spyware, worms, and other cyber threats lurk. The program attaches tiny color-coded icons to links that appear on a list of search returns a green check means it's safe to proceed, a red X means it's not; a yellow icon indicates nuisances such as spam or pop-ups. Why would you need this? Because simply clicking through to a suspect site can wreak havoc on a PC, and risky sites comprise a growing portion of search returns. If you want a service that will flag for inappropriate content such as porn, try Scandoo.