TCPView is described as 'Shows all active TCP/UDP endpoints, local and remote addresses, connection states, and owning processes with color-coded updates and adjustable refresh rates' and is an app in the network & admin category. There are more than 10 alternatives to TCPView for a variety of platforms, including Windows, Mac, Linux, Android and F-Droid apps. The best TCPView alternative is System Informer, which is both free and Open Source. Other great apps like TCPView are PortKiller, CurrPorts, LiveTcpUdpWatch and TCP Viewer.