TOP CODING SITES

FOR C & C++:

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1) http://www.cprogramming.com/

2) http://en.cppreference.com/w/

3) http://www.cpp4u.com/

4) https://groups.google.com/forum/?hl=en&fromgroups=#!forum/comp.lang.c

5) http://www.careerride.com 

6) http://beej.us/guide/bgc/

7) http://c.learncodethehardway.org/book/

8) http://www.gtk.org/documentation.php (GTK GUI with C)

9) http://www.postgresql.org/docs/9.2/static/libpq.html (PostgreSQL with C)

10) http://dev.mysql.com/doc/refman/5.6/en/c-api.html (MySQL with C)

11) http://devzone.zend.com/303/extension-writing-part-i-introduction-to-php-and-zend/ (PHP extensions with C)

FOR JAVA :

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1) http://www.oracle.com/technetwork/java/index.html

2) http://docs.oracle.com/javase/tutorial/ (J2SE only)

3) www.roseindia.net

4) http://www.java2s.com/

5) http://www.javaranch.com/

6) http://www.omgjavaprograms.com/

7) http://www.jdbc-tutorial.com/

8) http://www.javabeginner.com/

9) http://www.javalearner.com/advanced.htm

10)http://thenewboston.org/tutorials.php

11)http://www.javatpoint.com/

12)http://javapins.com/

13)http://serverside.com

14)htttp://jguru.com

15)http://java-questions.com

16)http://stackoverflow.com

17)http://tutorialspoint.com

18)http://javamex.xom

19)http://Myjavahub.com

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FOR ORACLE:

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1)WWW.NOTESBIT.COM

JAVASCRIPT:

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http://www.eloquentjavascript.net

FOR WEB:

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1) http://www.w3schools.com

2) http://tutorialspoint.com/

3) http://www.istutorials.com/

4) http://javascriptkit.com

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FOR UNIX AND LINUX

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1)http://UNIX.ORG

2)http://www.ubuntu.com/

3)http://www.redhatlinux.com/

4)http://www.javascriptkit.com/

5) http://www.ee.surrey.ac.uk/Teaching/Unix/

FOR VIDEO TUTORIAL

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1) http://www.learnerstv.com/ (video tutorials of all subjects)

2) http://javabrains.koushik.org/ (introductory videos for J2EE)

3)To all those who are seeking tutorials on Java technologies here are the few good youtube channels that I know which have good tutorials -> 

http://www.youtube.com/user/koushks/videos?view=1

http://www.youtube.com/user/thenewboston/videos?view=1

http://www.youtube.com/user/java9s/videos?view=1

http://www.youtube.com/user/zaneacademy/videos?view=1

http://www.youtube.com/user/zajavaprogramming/videos?view=1

http://www.youtube.com/user/edu4java/videos?view=1

Design Patterns -> http://www.youtube.com/user/zapatterns/videos?view=1

http://www.youtube.com/playlist?list=PLD7C84D86A6387755&feature=plcp

http://www.youtube.com/user/IntertechTraining/videos?view=1

TOP CODING CONTEST SITES:

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1) https://facebook.interviewstreet.com/recruit/challenges(for facebook)

2) http://www.facebook.com/hackercup/ (for facebook)

3) http://code.google.com/codejam (for google)

4) http://www.codechef.com/

5) http://codeforces.com/

6) http://www.topcoder.com/

FOR SOURCE CODE

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1) http://www.codejaw.com (for code sharing and code hosting)

2) http://www.codeguru.com/

3) http://www.sourcecodesworld.com (for source code of mini project)

4)http://www.happycodings.com/

5)http://www.w3professors.com

Python

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1. http://www.python.org
2. http://www.docs.python.org/tutorial
3. www.learnpython.org
4. www.learnpythonthehardway.org

TOP CODING CONTEST SITES:
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1) https://facebook.interviewstreet.com/recruit/challenges (for facebook)

2) http://www.facebook.com/hackercup/ (for facebook)

3) http://code.google.com/codejam (for google)

4) http://www.codechef.com/

5) http://codeforces.com/

6) http://www.topcoder.com/

ASP.NET Links
..............................................................

1) http://www.homeandlearn.co.uk/csharp/csharp.html

2) http://www.java2s.com/Tutorial/ASP.NET/CatalogASP.NET.htm

3)https://skydrive.live.com/?cid=2c5f5b0560e374cb&id=2C5F5B0560E374CB%21118

FOR ONLINE COMPILER
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1. http://codepad.org/
2. http://writecodeonline.com/javascript/
3. http://tinkerbin.com/
4. http://jsbin.com/
5. http://cssdesk.com/
6. http://jsdo.it/login/
7. http://code.google.com/apis/ajax/playground/
8. http://ideone.com/
9. http://viper-7.com/
10. http://www.jslint.com/
11. http://nodejs.org/
12. https://c9.io/
13. http://www.coderun.com/ide/
14. https://compilr.com/