See which ports belong to which programs! Port Explorer shows all the open ports on your system and what programs own them. Along with this ability it also has many tools including a packet sniffer, bandwidth throttling and country detection.

SocketWrench 3.5 Freeware Edition is a general-purpose WinSock ActiveX control available in both 16-bit and 32-bit versions. Developers can create virtually any type of client or server application using either the TCP or UDP protocols.

SmartSniff allows you to capture TCP/IP packets that pass through your network adapter, and view the captured data as sequence of conversations between clients and servers.

Eric's TelNet98 is the sophisticated Telnet and SSH client for Intranets and the Internet. This Windows Sockets-based ANSI- and SCO-ANSI compatible Terminal includes color, line printer emulation, automatic login and many other features.

Lucigenic TCP/IP is an advanced component implementation of the TCP/IP protocol. In addition, Lucigenic TCP/IP provides implementations for the HTTP protocol, DNS resolver services and 442 bit secure sockets.

LionFTP Pro is a standard File Transfer Protocol (FTP) client application for Windows Sockets.Fully uses Winsock-2 optimizations for best performanceUpload, Download and FXP with Resume capability,Rename, Make and Remove Directory .more

Client/Server C++ component library for TCP/IP winsock sockets network communication. Allows multiple servers and clients to run simultaneously over a TCP network such as the Internet or intranet (LAN). Works with C++,C#.NET, MFC and C++ Builder.

UltraSniff is a powerful network sniffer, It is designed for capturing and analysis of the packets through the netwok. Also UltraSniff is a sockets sniffer that can show you detailed process-related listing of all IP,TCP,UDP endpoints on your system.