DiamondCS Port Explorer 2.000
This socket analysis and exploration utility is designed for novice and advanced users alike.
It supports port-to-process mapping, packet-sniffing and anti-trojan capabilities, as well as a whois search client.
The program displays all open TCP and UDP sockets, and their respective states. Users can spy on all sockets owned by a process, and block sending or receiving of any or all sockets.