WFN (Windows Firewall Notifier) by Wokhan, Firewall extender/monitor
See
https://github.com/wokhansoft/WFN
https://www.wokhan.com/?sec=WFN#software_wfn
WFN started as an "extension" to the embedded Windows firewall, and offers real time connections monitoring, connections map, bandwidth usage monitoring... and has been made open source a few years ago. Features include: