Free Online Programming Books

I have been surfing for a while and been looking for free online programming books.
These books are scattered all over and not easy to find. So i'm blogging on this so i can have a central location of all the online programming books i come across on the web. Hope it helps some one some day. Additions to the list are welcome. Just let me know and i will include them. Most of these links where taken from Programming ebooks

Java

• How To Think Like A Computer Scientist
  http://www.oopweb.com/Java/Documents/ThinkCSJav/VolumeFrames.html


• Java Programming Tutorial: Introduction to Computer Science
  http://www.oopweb.com/Java/Documents/JavaNotes/VolumeFrames.html


• Java AWT Reference
  
  http://www.oreilly.com/catalog/javawt/book/index.html


• Enterprise JavaBeans
  http://www.computer-books.us/java_1.php


• Exploring Java
  http://www.computer-books.us/java_4.php


• Java Servlet Programming
  http://www.computer-books.us/java_9.php


• Java Look and Feel Design Guidelines, Second Edition
  http://java.sun.com/products/jlf/ed2/book/index.html


• Sams Teach Yourself Java 2 in 24 Hours
  http://www.samspublishing.com/library/library.asp?b=STY_Java2_24hours

C#

• Data Structures and Algorithms with Object-Oriented Design Patterns in C#
  http://www.computer-books.us/csharp_2.php


• C# Language Specification
  http://www.computer-books.us/csharp_1.php


• C# - The Basics
  http://www.computer-books.us/csharp_0004.php

C++

• How To Think Like A Computer Scientist with C++
  http://www.oopweb.com/CPP/Documents/ThinkCScpp/VolumeFrames.html


• Teach Yourself C++ in 21 Days, Second Edition
  http://www.cs.montana.edu/%7Embauer/wwwback/c%2B%2B/index.htm


• Data Structures and Algorithms with Object-Oriented Design Patterns in C++
  http://www.brpreiss.com/books/opus4/html/book.html


• An Introduction to C++ and Object Oriented Programming
  http://www.kcl.ac.uk/kis/support/cit//fortran/cpp/ch.htm


• C++ GUI Programming with Qt 3
  http://www.phptr.com/promotion/1484?redir=1
• The Function Pointer Tutorials
  http://www.oopweb.com/CPP/Documents/FunctionPointers/VolumeFrames.html


• Cross-Platform GUI Programming with wxWidgets
  http://www.phptr.com/promotion/1484?redir=1

C

• C Programming
  http://www.oopweb.com/CPP/Documents/CProgramming/VolumeFrames.html


• Writing Bug-Free C Code
  http://www.duckware.com/bugfreec/index.html


• Learning GNU C
  http://www.linuxtopia.org/online_books/programming_books/learning_gnu_c/index.html


• The C Library Reference Guide
  http://www.acm.uiuc.edu/webmonkeys/book/c_guide/index.html


• Programming in C: UNIX System Calls and Subroutines using C
  http://www.cs.cf.ac.uk/Dave/C/CE.html

Ruby

• Programming Ruby - The Pragmatic Programmer's Guide (First Edition)
  http://www.ruby-doc.org/docs/ProgrammingRuby/


• Why's (Poignant) Guide to Ruby
  http://poignantguide.net/ruby/


• Pragmatic Programmers Guide
  http://www.rubycentral.com/book/

Perl

• An Introduction to Perl
  http://www.linuxtopia.org/Perl_Tutorial/index.html


• A Perl Tutorial
  http://www.civeng.carleton.ca/Courses/Grad/1995-96/82.562/perl/


• Perl for System Administration
  http://www.unix.org.ua/orelly/perl/sysadmin/index.htm


• XML processing with Perl
  http://www.xmltwig.com/tutorial/perl_xml/mtb04_01.html

Perl in a Nutshell
http://www.unix.org.ua/orelly/perl/perlnut/index.htm

• Perl Regular Expression Tutorial
  http://virtual.park.uga.edu/humcomp/perl/regex2a.html

Python

• Thinking in Python
  http://mindview.net/Books/TIPython


• Dive Into Python
  http://diveintopython.org/


• A Byte of Python
  http://www.ibiblio.org/g2swap/byteofpython/read/


• Python Short Course
  http://www.wag.caltech.edu/home/rpm/python_course/


• Python Cookbook
  http://aspn.activestate.com/ASPN/Cookbook/Python


• Python GUI Programming
  http://www.metaslash.com/brochure/tutorial/


• Python for Java programmers
  http://www.razorvine.net/python/PythonForJavaProgrammers


• PyGTK 2.0 Tutorial
  http://www.moeraki.com/pygtktutorial/pygtk2tutorial/


• Socket Programming HOWTO
  http://www.amk.ca/python/howto/sockets/sockets.html


• Regular Expression HOWTO
  http://www.amk.ca/python/howto/regex/

Php

• Practical PHP Programming
  http://www.hudzilla.org/phpbook/


• PHP 5 Power Programming
  http://www.computer-books.us/php_2.php


• PHP Cheatsheet for Beginners
  http://books.iuniverse.com/viewbooks.asp?isbn=0595354548&page=fm1


• PHP articles and tutorials
  http://www.melonfire.com/community/columns/trog/archives.php?category=PHP