TCP Spy
When TCP Spy's Start button is pressed, it will capture and display all socket calls of the next application that starts and makes a socket call. It will also capture and display the data that is sent and received on the application's sockets. The application can be of any type. ... Based upon each socket's first transferred message, TCP Spy will determine if the protocol being communicated over the socket is text based. ... If a message contains only text, TCP Spy will display it as such. ... Else, TCP Spy will show the message in hexadecimal and ASCII.
http://www.westbrooksoftware.com/tcpspy.zip - 565Kb - Download - Screenshot

Socket Workbench
Socket Workbench is the definitive tool for analysing socket communications that underlie the Internet and several types of inter-process communication. Configure Socket Workbench to be a socket client (like a web browser or e-mail client) or a socket server with ease. ... - Configure Socket Workbench to be a socket client or a socket server. ... Also, Socket Workbench has the unique "Pass Through Mode" which allows the interception of socket communications between a client and its server without packet sniffing.
http://swb-download.tcpiq.com/downloads/SWB.exe - 4Mb - Download - Screenshot

DiamondCS Port Explorer
See which ports belong to which programs! Port Explorer shows you all the open ports on your system and what programs own them (called Port to Process mapping). Along with this ability it also has many tools including a packet sniffer, bandwidth throttling and country detection to name just a few. ... A user could block data sending by a suspicious socket - yet still see what data is coming in by spying on this socket. ... Port Explorer also gives the great ability to control these sockets - by allowing the user to spy on any or all sockets owned by a process, and to block sending or...
http://www.diamondcs.com.au/downloads/pesetup.exe - 1Mb - Download - Screenshot

Proxy Workbench
Proxy Workbench is a unique proxy server ideal for developers, trainers and security experts that displays its data in real-time. You can actually see the data flowing between your e-mail client and the e-mail server, web browser and web server or even analyse FTP in both Passive and Active modes. ... Major Features - See data flow between socket connections - Animated socket connection diagram - 'Pass Through' protocol handler for debugging protocols - Connection failure simulation strategies allow you to simulate: a) Slow or asymmetric Internet connections (bandwidth throttling) b)...
http://pwb-download.tcpiq.com/downloads/PWB.exe - 6Mb - Download - Screenshot

SSLSocket Wizard ActiveX
Networks and the Internet are becoming not only a nice thing to have but are now a necessity and your application need to be able to communicate over them. SSL Socket Wizard allows you to easily communicate to a remote server using the TCP protocol and also adds the ability to use Secure Socket... SSL Socket Wizard now supports SOCKSv4 and SOCKSv5, also known as SOCKS4 and SOCKS5, FireWall Proxies. ... Some ideas are: communication channels to bank payment processors that stay connected for very long periods of time custom implemented protocols for communication between applications...
http://www.seekfordsolutions.com/Products/files/IPWizardToolpackv3.exe - 5Mb - Download - Screenshot

BigSpeed Secure Socket Library
BigSpeed Secure Socket Library is an ActiveX control that dramatically simplifies and accelerates the development of proprietary communication solutions over the Internet. It implements a flexible message-oriented protocol on top of a single TCP connection. ... BigSpeed Secure Socket Library can be used both on client and server side, with centralized management of all connections. ... BigSpeed Secure Socket Library utilizes an elegant event-driven paradigm for easy integration into Windows applications.
http://www.bigspeed.net/download.p...ssocklib/bssocklib_free_setup.exe - 785Kb - Download - Screenshot

SocketWrench .NET Edition
The SocketWrench . NET Edition is a managed code class that simplifies the task of developing TCP/IP networking applications in Visual Studio . NET using any of the available programming languages such as Visual Basic and C#. SocketWrench is ideal for the developer who requires the features and... NET class interface has properties, methods and events that are very similar to the control that you've used in languages like Visual Basic 6. ... For developers who have used the ActiveX version of SocketWrench, you'll immediately find yourself in familiar territory.
ftp://ftp1.catalyst.com/pub/cstools/sw45net.zip - 3Mb - Download - Screenshot

Checklan Central Admin
Agent less, Checklan Central Admin is the easiest and powerful way to monitor, manage, inventory and act remotely on, all Performances counters, windows services, Processes, Printers, Sockets, Hardware, Hot fixes, Drives, Shares, OS, Disk, AD and MSI softwares. ... (by socket mode). ... The only software which is able to control dynamically all performance counters for Exchange, Oracle, SQL, Lotus Notes, and all applications which has performance counters available in any language concurrently. ... Online knowledge base, support, updates.
http://www.checklan.net/downloads/Checklan_Central_Admin_141.zip - 3Mb - Download - Screenshot

Chilkat SSL COM Component
Chilkat SSL is a free COM component that makes it extremely easy to communicate securely over a TCP socket using either the SSLv3 or TLSv1 protocols. This component is designed to be used by C++ applications, and cannot be used from Visual Basic or ASP.
http://www.chilkatsoft.com/ChilkatSsl.exe - 977Kb - Download - Screenshot

MyEraseR
Easy-to-use POP3/APOP3 spam filtering utility, mail checker,daytime and finger client with socket 4/4A/5 proxy support with or without authentication. Complete log file will be generated, doesn't require installation and will never add new registry key entries to your Windows registry database.
ftp://ftp.elf.stuba.sk/pub/pc/comm/myeraser.zip - 387Kb - Download - Screenshot