TCPView is described as 'Windows program that will show you detailed listings of all TCP and UDP endpoints on your system, including the local and remote addresses and state of TCP connections' and is an app in the network & admin category. There are more than 10 alternatives to TCPView for a variety of platforms, including Windows, Linux, Mac, 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 TCPEye.