Nan Hai Da Chang Metal & Electric Factory
Established in 1989,professionally invents and produces full range of indoor switches,trailing sockets,socket adaptors,plus,extension wires and other electrical appliances.
http://www.nh-dachang.com/

Ugcom. Co., Ltd.
Manufactures crt socket, ac socket, jack socket, jack block, shield box, rf splitter, bn connector, direct connector, antenna adapter and receptacle peri crt socket. From Korea.
http://www.ugcom.net/

Yueqing City Success Industry Company
Manufacture of concentric socket series, out-wiring sockets and wiring -post socket series, switches and power-supply socket. From China.
http://www.chinacgic.com/

PortMess
Network socket tester useful for finding bugs with socket handling.
http://prowl.org/programs/portmess/

Robolights
Manufacturer of the Smart Socket injection molded socket outlet box for use on internally wired stage lighting bars.
http://www.robolights.co.uk/

Socket Communications
Socket Mobile offers a fully integrated, flexible, and easy-to-optimize premium platform with all the essential scanning and connectivity peripherals. The Socket system brings just the right mobile business functions to today’s vast diverse marketplace – easily customized to meet a range of deployment needs.
http://www.socketcom.com/

Crescent Internet ToolPak
Bundle of ActiveX controls for FTP, HTTP, IMAP4, NNTP, POP3, RAS, SMTP, socket client, socket server, UUEncode, and Telnet. By Sax Software Corp. [Control, Commercial]
http://www.saxsoft.com/ipak/

Smart Socket by PDM Systems Inc.
Offers a DIN rail mountable, programmable relay socket with 20 control functions that may be selected for instant use with a standard 8 pin octal relay.
http://smartsocketbypdm.com/

Socket++
Defines a family of C++ classes that can be used more effectively than directly calling the underlying low-level system functions. One distinct advantage of the socket++ is that it has the same interface as that of the iostream so that the users can perform type-safe input output. [Open Source]
http://www.linuxhacker.at/socketxx

Stream Socket API
Provides a simple stream socket interface for C++.
http://www.pcs.cnu.edu/~dgame/sockets/socketsC++/sockets.html