A couple of freeware newbies from Steve Gibson :

For Zone Alarm users :

There is a <font color=d2691e> Log File Analyser </font color=d2691e> for ZA. This translates the contents of the log file into a table, from which you can get details of the attacks being made on your system, find out from where they are coming and report them.
<A target="_blank" HREF=http://www.zonelog.co.uk>Zone Alarm Log File Analyser</A>

For Windows 2000 users :

Patchwork is a <font color=d2691e> Security Leak Tester </font color=d2691e>. It is a small program that will scan your system and let you know if all the security patches have been installed properly, and are working as they should.
<A target="_blank" HREF=http://grc.com/pw/patchwork.htm>Security Leak Tester</A>