TinyWall - Lightweight and non-intrusive firewall
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
simplewall - Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on...
tcpdump - tcpdump is a common packet analyzer that runs under the command line.
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
SmartSniff - SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers.