Nassau is a Free and Portable Network Connection Viewer Utility created by run.to/sz. It can be used to View, List, or Display All Network Connections and starts minimized to the taskbar. Connection information such as the IP, Gateway, and DNS server of each Network Adapter is listed in a structured window for the listed user/computer.
NetCheck is a Free, simple Internet Connection Tester. It can be used to check the status of your internet connection by attempting DNS resolve and TCP connection tests. The DNS test allows NetCheck to test if your system can currently resolve Internet addresses to their respective numeric IP addresses, and the TCP test determines if your system is able to connect to servers on the Internet. Just launch NetCheck and press the Start button to run the test.
Connection Monitor is a Free Stand Alone Portable utility that can be used to monitor inbound and outbound socket connections. knowing which network and internet connections are taking place can help you keep your network secure. Connection Monitor scans existing connections and displays the local address and port, remote address and port, TCP UDP protocol and status of those connections.
TCPView is a lightweight and portable Windows tool that provides a comprehensive overview of all current TCP and UDP network connections, including the process names associated with each endpoint. Designed by Microsoft's Sysinternals team, it offers more detailed insights than the default Netstat utility found in Windows. For command line enthusiasts, it also includes a console version called Tcpvcon with equivalent functionality.