Java

Developed in 1995, this object-oriented programming language based on C and C++ was originally owned by Sun Microsystems and is now open-source.

Resources in this category:

Code Beach
http://www.codebeach.com/

"Code Beach is your complete guide to free and open source code and tutorials for ASP, C++, C#, ColdFusion, Delphi/Kylix, Java, JavaScript, Palm, Perl, PHP, Pocket PC, Python, Visual Basic, and XML."

DevCentral
http://devcentral.iftech.com/default.php

This website contains free turtorials for "the software development community" which include XML, Java, C++ and more.

The Java Tutorial Object-Oriented Programming for the Internet
http://java.sun.com/docs/books/tutorial/

You can teach yourself how to program in Java by using this on-line tutorial. Examples are provided. You just need to download some basics (the Java Development Kit, which they provide) to get you started. There are several "trails" you can follow depending on how you want to learn.

Linux Planet
http://www.linuxplanet.com/linuxplanet/

Features news, tutorials, reference resources, and documentation about the Linux platform and for Linux system administrators.

ProgrammingTutorials.com
http://www.programmingtutorials.com/

A guide to free computer programming tutorials on the Internet. Includes briefly annotated lists of tutorials for many programming languages, including HTML, Perl, Java, and more.

Stanford CS Education Library
http://cslibrary.stanford.edu/

Presents basic information about Unix, C Programming, Perl. Test new skills with games and puzzles.

WebPelican
http://www.webpelican.com/

Contains tutorials and resources for Internet programming using XHTML, CSS, XML, and Java.