I am looking for sites like killerstartups.com which allow to vote with out an account (and without logging in to the site). If you know any, please share.
I'm not sure what you want. You are wanting a script like that or you just want a website that has a poll type system where you can add votes anytime you want? May I ask why?
Very simple. I want to ask some of my friends to vote for the stuff that I might want to submit which they can do quickly and easily.