Yeah, Sygate have bailed....
Sunbelt Kerio Personal Firewall is excellent and less intrusive than ZoneAlarm
http://www.sunbelt-software.com/kerio.cfm
Full function for 30 days, then reverts to basic (still very effective) functions. Only $19 to keep it full and cheap at the price, I say.
If you have any old 386 or better class machine hanging around then give some consideration to using it as a dedicated firewall using the single-purpose FREESCO micro-Linux-on-a-floppy. No impact on your main machine and MUCH more secure. Runs off a floppy (though you can install it to one of those tiny old hard drives from the spares box if you want).
http://www.freesco.org/
Some technical info
on FREESCO)
* Minimum install requires a 386sx 16 with 8mb of ram. 16+mb of ram is recommended for enabling servers
* Modes of operation. ethernet, dialup, leased, bridge, RAS, Printer server. Some of these modes can run at the same time as well as switching between dialup and ethernt modes
* 2.0.39 Linux kernel
* Support for up to ten networks cards
* Support for up to five printers
* Support for up to ten modems, although only four regular modems. Support includes Unix 4 or 8 port modems
* FREESCO v.0.3.x can run entirely from ram. This requires at least 20+MB
* FREESCO v0.3.x can run up to 16MB of packages with ramdisks enabled on a floppy install
* Ident, DHCP, DNS, Print, SSH, FTP, HTTP servers
* RAS (Remote Access Server) for dialin and nullmodem connections
* PPPoE, and PPtP clients
* Dynamic DNS, Zonedit and DHS support
* Limited support for SCSI hard drives
* FREESCO v0.3.x can be installed on any FAT 16/32 IDE drive on the primary or secondary controller and the primary or secondary drive
* FREESCO can also be installed on an EXT2 partition with the addon ext2 package availible from FREESCOsoft
* The specially modified 2.0.39 Linux kernel has an increased masq table and the icmp leak patch for security as well as many other patches to enhance it's abilities.
* ISA PnP so network cards and PnP modems can be configured.
Ludicrously easy to set up. Extremely capable and versatile.
I used it for a long time until I needed wireless and got a Netgear router/firewall.
Mac