Radialpoint Security Suite (Powered by BitDefender (Score 1)

Radialpoint actually provides a really good security suite (Anti-Virus, Anti-Spyware, Parental Control + loads of other features) for free through its "user community" program: http://radialpoint.net/home/

This is the same security software that ISPs like Verizon, Rogers, Bell Canada, Virgin, etc... charge their customers anywhere from 8$-12$ a month to use.They give away a limited number of copies for free in order to collect crash data and improve the product that's ultimately delivered to ISPs, kind of like a perpetual beta test. The software itself is powered by the latest BitDefender engine for real-time, on-demand and scheduled scanning. It also lets you use WebSense to do parental controls.

They even have a Mac version that's freely available through their site. Check it out!