Introduction to network functions in C
A basic tutorial showing how to write simple socket servers. Source code, glossary and examples are also available.

An Introduction to Sockets in C Through Annotated Examples
An introduction by example about sockets with the C programming language.

Java Tutorial Lesson: All About Sockets
Tutorial on Java sockets programming. (Sun)

Packet Sniffer
A packet sniffer program which demonstrates the use of packet sockets on the Linux environment. Written in C++

Programming UNIX Sockets in C - Frequently Asked Questions
This is a list of frequently asked questions, with answers about programming TCP/IP applications in unix with the sockets interface.

Sockets Programming
Tutorial by Peter Burden.

Spencer's Socket Site
About network programming with sockets under Unix and Windows. Tutorials and links to other FAQs, tutorials, and sample code.

UNIX Socket FAQ
Frequently asked questions with answers about programming with sockets in UNIX environments. By Vic Metcalfe.

Winsock Programmer's FAQ
Frequently asked questions with answers for WinSock programmers. By Warren Young.