Comodo firewall

Homepage: http://www.personalfirewall.comodo.com/

Download link: https://personalfirewall.comodo.com/free-download.html

Operating Systems: Windows

Description: Complete firewall with many features and strong intrusion detection. Suports ICS.

Emnisoft Internet Security

Homepage: http://www.emsisoft.com/en/software/

Download link: http://www.emsisoft.com/en/software/

Operating Systems: Windows

Description:Firewall

Smothwall Express Firewall

Homepage: http://www.smoothwall.org/

Download link: http://www.smoothwall.org/download/

Operating Systems: All (Smoothwall is an operating system)

Description: A different kind of firewall. We use an old pc and install smoothwall express from cd.(all hard disk data will be erased) Then we install our internet connection (modem ή router)  on that pc and set this pc as gateway to all other pc’s on our network. Supports  unlimited local ip adresses, port forwarding, ip block list, PPP, PPPoA, PPPoE,web proxy, pop3 proxy, voip proxy, im proxy.