I reported this in another thread, but I think it needs clarification and could use a separate entry.

PC Tools Firewall Plus released a major upgrade September 29. Registration is free, and necessary (they email you the serial number for it to work properly). This version works with XP 32-bit, Vista 32 & 64-bit, and Windows 7 32 & 64-bit. It is available at FIREWALL.

I like the product and have used it for some years on certain computers.