I'm looking for a free Live web support software to install in my
webserver like PHPLive. Also installation should require only user
permissions not root permissions.

Also, the software can be in any language need not be PHP but to be
installed in Linux Server which has mySQL database.

I can accept GNU GPL and can display on my site as well.

All the feature which I expect is it should work similar like PHPLive.

Thanks

You may want to take a look at the project:
http://chatforte.sourceforge.net
I am sure the product could very well meet your requirements.
You might contact the developer to get the latest release.

Regards
ldavinci-ga

Actually you can find a cracked phplive v2.5 doing a google search. 
Im using it now.  I also upload it to a free php/mysql hosting
account.  The free host is shyper.com.  I can't post the direct
download here, you can contact me via the link below.

http://www.phplive.shyper.com/phplive/request_email.php?l=cewu&x=1&deptid=1