Apart from ZoneAlarm, because I’m seeking something to replace it. The latest update caused the whole thing to get borked.
An older version would be Ok, as well.

I don’t know how good they are (only used one), but here’s a few

Kerio Personal
http://www.kerio.com/us/kpf_download.html

Sygate Personal
http://smb.sygate.com/free/default.php

Outpost free (I actaully used this one a few years back. really nice then)
http://www.agnitum.com/products/outpostfree/download.php

Omniquad
http://www.omniquad.com/pfirewall.htm

Comodo
http://www.personalfirewall.comodo.com/