Learn all computer languages

Here some sites are given which you can use them to learn languages like HTML,XHTML,CSS,TCP/IP,PHP,ASP&ASP.net,Java&JSP,XML,Perl,Python, etc.
HTML
htmlhelp.com
htmlgoodies.com
pageresources.com

PHP
php.net
phpbuilder.com
php-resources.com
scripts.com
phpfreaks.com

ASP & ASP.NET
asp.net
worldofasp.net

JAVA & JSP
java.sun.com/javascript
javascriptworld.com
javascript.com

XML
xml.org
topxml.com
xmlinfo.com
xmlpitstop.com

PERL
perl.org
perlmonks.org
theperlreview.com
perlcast.com

PYTHON
python.org

the below listed sites very good to learn.

ALL LANGUAGES
w3c.org
w3schools.com
webdevolper.com
programmerheaven.com
opendeveloper.org