I found it by doing a google search (an underused resource) for Kerio Personal Firewall and that gives a link to Sunbelt’s web site who are now the distributors of KPF http://www.sunbelt-software.com/Kerio.cfm.

Many can’t afford to pay for pro versions of software, the retired for instance, but there really is a wealth of freeware not to have to circumvent paid for software without the associated risks. You must however still thoroughly check out what software, especially security based software free or paid for, you shouldn’t be loading something because its free but because it does what you need.

Spyware Warrior - Rogue Anti-Spyware, this gives a basic list of trustworthy applications some free some not Spyware Warrior - Trustworthy Anti-Spyware Products