Free Sockets Libraries

The Simple Sockets Library
The Simple Sockets Library makes sockets easy to use! And, it comes as public domain source code, free via the web.

Network Security Services (NSS)
Network Security Services (NSS) is a set of libraries designed to support cross-platform development of security-enabled server applications

TurboPower Internet Professional
Internet Professional is a set of VCL components providing Internet connectivity for Borland Delphi & C++Builder. iPRO includes POP3, SMTP, NNTP, FTP, HTTP, Instant Messaging, & HTML viewer components, as well as components for low-level socket access.

TurboPower Async Professional
Async Professional is a comprehensive communications toolkit for Borland Delphi, C++Builder, & ActiveX environments. It provides direct access to serial ports, TAPI, and the Microsoft Speech API. It supports faxing, terminal emulation, VOIP, & more

TurboPower SysTools
SysTools is a library of utility routines & classes for Borland Delphi, C++Builder, & environments that support COM. It includes 1-D & 2-D bar codes, sorting, money routines, logging, high-precision math, a run-time math expression analyzer, & much more.

libtcp++ is a C++ class library to facilitate the creation of TCP/IP clients and servers.