Free online computer books, documentations and references. All which can be viewed, copied and printed at no charge for private use.

Programming resources, tutorilas and FAQs. Also geometric formulas. Microsoft OS and program tutorials.

Programming tutorials and source code for many programming languages and especially for the .NET Framework. Also has software articles, reviews, news, projects, forums, blogs from the IT domain.

Sources (Pascal, Delphi, C, Java), games (Java, C).

Source code, tips and tricks. Most source is free.

A collection of news, resources, and tools for software engineering, computer programming, and information technology management.

Search engine for open source code, projects and technical pages.

Resources for C/C++, Visual C++ and C# .Net including tutorials and articles, free source codes, and open source utilities.

Resources for Java, Javascript, Perl, Python, Macintosh and Palm.

A community site for open source developers. Articles covers several languages as well as important stuff like regular expressions and community building.