Little Snitch - Little Snitch is a firewall application that monitors and controls outbound internet traffic.
TinyWall - Lightweight and non-intrusive firewall
COMODO Internet Security - Download Free Internet Security Software for Complete protection against viruses and attacks of your computers. Know what's new in Comodo Internet Security.
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
Gufw - Gufw is an easy, intuitive way to manage your Linux firewall.