Capturix NETWorks 

Capturix NETWorks is a network utility software that ables you to test and diagnose all common problems from any network.
network tcp/ip port scanner whois server http terminal networking trace router route ip config

Advanced TCP Logger 

This program is a simple proxy server(port-mapper). It is an ideal tool for monitoring any network software or for researching network protocols.
network monitor tcp wrapper ip sniffer data logger proxy server

Proxy Workbench 

Proxy Workbench is a unique proxy server ideal for developers, trainers and security experts that displays its data in real-time.
proxy workbench proxy server sockets socket tcp udp sockets tcp sockets packet sniffing socket protocols protocol analyzer protocol analyser tcp/ip winsock