Hello im on the lookout for any open source or commercial survey web application that those paid to do surveys websites are using...please advise, thanks :)

Here are a few links you can check out, there are quite a few applications like this out there.

Various languages;

http://www.sourcecodeonline.com/details/survey_generator.html
http://www.vclcomponents.com/catalog/Online_Survey_Tool
http://php.resourceindex.com/Complete_Scripts/Survey_and_Voting/
http://www.bmgadg.com/survey.php
http://sourceforge.net/projects/uccass/
http://www.vote-pro.com/

www.polldaddy.com
www.isalient.com
Survey Monkey (Google)

ActiveCampaign has a survey application too.