MSDN Forums - http://forums.microsoft.com/msdn/ Offers various forums for software developers about the multiple Microsoft, windows and .NET technologies.
ProgrammingTalk - http://www.programmingtalk.com/ A forum for programmers covering the major programming languages and technologies.
Oceanius Networks - http://www.oceanius.com A medium size IRC network for teen programmers, and teens at heart.
Talk about Programming - http://www.talkaboutprogramming.com Talk about programming languages from A to Z.
Programming Forums - http://www.programmingforums.org/ Help forum for application development and script programming.
DevShed Forums - http://forums.devshed.com/ A forum for developers of many different technologies including PHP, SQL, ASP, Perl, and Java.
Geo Source Code - http://www.geosourcecode.net/ Forum with code of many programs and projects: general topics, data structures, numerical analysis, graphics, compiler construction, algorithms, system programming; C/C++, Visual C++, PHP, MySQL, Java, JavaScript, D/X/HTML, CSS, ASP/ASP.net, JSP, Assembly, Visual Prolog, SEO.
Young Computer Programmers Forum - http://www.youngcoders.com A forum aimed at helping younger people that are interested in computer programming.
Developer's Place - http://www.developersplace.com Discussion forum where developers can solve problems and talk about technology. Includes Javascript, CSS, Java, JSP, Actionscript, Delphi, C++, C, C#, Databases, Perl and PHP.
GO4Expert - http://www.go4expert.com/ A forum for developers that wish to discuss all major programming languages such as C++, Java, .NET.
Dev-Exchange.com - http://www.dev-exchange.com/ Free IT forum and resources for developers and designers.
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