RejZoR's little secrets

Immunet Protect
http://www.immunet.com/protect

Latest security trend is cloud computing. And Immunet Protect is cloud based anti-malware software.
Technically speaking, the more users use it, the better it'll work. Can't really say much about it's effectiveness, but it's free and has a very low impact on performance. And can also be used along with other security programs. So give it a try if you're interested and contribute to their cloud system.

EDIT:
I forgot to mention it's still in BETA stage, although they don't mention that anywhere in the program and only on some parts of the webpage.