Symantec's Norton Personal Firewall 2005 - keeps personal data in and hackers out. Right out of the box, it makes your PC invisible on the Internet so that hackers can’t find it. The program’s intelligent intrusion prevention technology blocks suspicious Internet traffic. And easy-to-use privacy controls prevent personal information from being sent out without your knowledge...

Kerio Personal Firewall (KPF) - helps users control how their computers exchange data with other computers on the Internet or local network. Kerio Personal Firewall is a necessity for all desktop computers connected to broadband Internet, using DSL, cable, ISDN, WiFi or satellite modems. Within an organization, Kerio Personal Firewall prevents a single computer from attacks initiated by internal users. Remote workstations and laptops running KPF are protected from Internet born attacks...

Sygate Personal Firewall Pro - has redefined the personal firewall market with a multi-layered shield of network, content, application, and operating system security. It protects your system from intrusions designed to exploit vulnerabilities in Internet and Intranet communication. It is the ultimate desktop security solution trusted by professionals and relied upon by millions of users.