www.wysiwygwebbuilder.com

I think it may be best if you tried google for these... what your asking is time consuming to make, test and build in the extension builder and it would need to be shared with everyone not just yourself.... I have came across some links you can try that may help I can voch for any of these so it a matter of just testing them for yourself

http://download.cnet.com/HOT-or-NOT/300 ... ?tag=lst-1
http://destiney.com/scripts#Destiney_rated_images
http://www.scriptdungeon.com/freephpscr ... cripts3111
http://www.hotscripts.com/Detailed/54506.html
http://sourceforge.net/projects/amigeekornot/

This is very complex to build and you have to use a mqsol database,I recommend to use a forum script what does have all these options.