Portmaster - Is a Privacy Modular Privacy App which includes a "DNS over TLS" feature as well as an "Application Firewall".
TinyWall - Lightweight and non-intrusive firewall
NetLimiter - NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows.
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
Pi-hole - Pi-hole is a multi-platform, network-wide ad blocker.
GlassWire - Visualize network activity in detail, get notified when new apps access the network, look out for...