Six free security tools you shouldn't live without | NetworkWorld.com Community:
"I won't keep you in suspense. I'll go ahead and name them right here, at the top of my post -- the six free security tools that all IT folks should know about and use. (But, you'll have to click through this nifty mult-page post to let me explain my choices.) And the winners are ... MetaSploit, Splunk, Google (don't laugh -- it's true!), KeePass, Helix and Netwox. Now read on to learn why ..."