Memory Structures Library (MemSL)
- Data structures, collections, algorithms with source code for C and C++.
- http://www.softwaresensation.com/mainView.jwa?c=memSLIntro

C C++ Users Journal
- Source code of basic and advance C language.Good for not only new users but also technical users see it and use it.
- http://www.ddj.com/dept/cpp/cuj.jhtml

Exceptions in plain C
- Hack which enables throwing and catching exception structures (which can be of anything) through non-local jumps.
- http://adomas.org/excc/

Christensen Tools Page
- Contains software tools (C sources) related to performance evaluation and TCP/IP sockets programming.
- http://www.csee.usf.edu/~christen/tools/toolpage.html

C Code Fragments and Snippets
- A small online repository containing; c code fragments, snippets and examples, some basic programs and general documentation all regarding GNU/Linux system administration and C programming.
- http://www.rdrs.net/

CRBond
- Source codes of scientific applications, graphic applications and math applications.
- http://www.crbond.com/

C Source Codes @ VyomWorld.com
- Contains categorized source codes in C, including interaction with Hardware.
- http://www.vyomworld.com/source/LanguageHome.asp?LangId=1

VyomWorld.com - C Projects Page
- Contains C/C++ Projects with source code.
- http://www.vyomworld.com/source/c_projects.asp

Ramakrishan Venkitaraman's Home Page
- Contains source code for networking and distributed system projects. Also contains the source code for the Garbage Collector for the C programming language.
- http://www.utdallas.edu/~ramakrishnan/

Cnippets
- Melange of drop-in C code including a fixed-size memory pool and a generic, user-definable hash implementation.
- http://www.25thandclement.com/~william/projects/cnippets.html

Publib
- Attempt at creating a library of reusable C functions.
- ftp://ftp.funet.fi/pub/languages/C/Publib/

Hello, World program
- Your first C program.
- http://www2.latech.edu/~acm/helloworld/c.html

Cprogramming.com - Source Code
- A collection of source code including graphics,game,and sound source.
- http://www.cprogramming.com/cgi-bin/source/source.cgi

C Programming for Engineering Applications
- Free C source code and tutorials for engineering applications. Includes graphics, both polar and quadratic, dealing with files, integration, quality control and inspection.
- http://www.bigprof.com/c4engineering/

ProgrammersHelp
- Categorised C source code.
- http://www.programmershelp.co.uk/ccatcode.php

BlueParrots
- C,C++ source code examples for games,graphics and sound.
- http://www.blueparrots.com/

Mozilla
- An open-source web browser, designed for standards compliance, performance and portability.
- http://www.mozilla.org/