TinyWall - Lightweight and non-intrusive firewall
Little Snitch - Little Snitch is a firewall application that monitors and controls outbound internet traffic.
Emsisoft Online Armor Firewall - Emsisoft Online Armor Firewall is a freemium online firewall protection system by the Emsisoft that is based on the own independent protection technology of the Emsisoft.
FortKnox Firewall - Free Firewall Download & Personal Firewall Protection against Hackers, Spyware and Trojans with well-known FortKnox Firewall Software Download from NETGATE Technologies.
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.
ZoneAlarm Free Firewall - Personal Firewall software