"Snoopy": Lots of them (and a whole lot of other types of software):

http://www.econsultant.com/i-want-freeware-utilities/index.html
http://www.econsultant.com/i-want-open-source-software/index.html

Sorry, I can't recommend one of the "Anti-Spyware/Anti-Virus/Anti-Rootkit" because I don't use them (my connection to the internet is through a Linux machine which has its own firewall).

"Snoopy": I don't know a free combination of spyware/antivirus/firewall, I use avg free for antivirus and anti-spyware(http://free.grisoft.com/doc/1). As a firewall I used Sygate, but during the search for an english download page I got informed that Symantec bought Sygate and stopped serving updates, so I might consider going back to Zone Alarm (http://www.zonelabs.com/store/content/company/products/trial_zaFamily/trial_zaFamily.jsp), also I didn't really like it..

Gordon Shumway: I had zone alarm and had a lot of troubles with it was it kept blocking my net access if my machine was idle.. real pain.. so that is gone. I fully recommend AVG ( the free one) Ive had it for about a year and recommend it over Norton. My hubby tries to disuade folks from buying Norton and when he works on their PC's he puts on AVG.  The down side is we get fewer returns lol. Folks arent getting the viruses they were getting with other programs so less work for him!

Rose: I know, there are several issues with ZoneAlarm, you can't configure too much yourself and it doesn't tell you very much - just like it would be a MS app ;)
I loved Sygate, very sad that #*!°~#- Symantec stopped it...