ufw - Ufw stands for Uncomplicated Firewall, and is program for managing a netfilter firewall.
ferm - ferm is a tool to maintain complex firewalls, without having the trouble to rewrite the complex...
LuLu by Objective-See - LuLu is the free open-source macOS firewall that aims to block unauthorized (outgoing) network...
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.
Plasma Firewall - Plasma Firewall is an open-source control panel with which you can manage your system firewall.
Total Defense Internet Security Suite - Total Defense Internet Security Suite is an ultra-modern internet protection system that provides the users with the system of protecting their entire network structure against the both external and internal potential threats.