ActiveSocket is a Network Communications ActiveX Control. Features: Telnet, Ntp, SNMP, Wake On Lan (also called WOL), client/server and more, all based on WinSock. Visit http://www.activexperts.com/activsocket to view online samples.
TCP Spy captures and displays all socket calls that an application makes and the data that is sent and received on the application's sockets. TCP Spy will work with any type of application.
Socket Workbench is the definitive tool for analysing socket communications that underlie the Internet and several types of inter-process communication.