Are you looking for a reliable, fast and free proxy server? Here is a great one, Named PaperBoy (ad-supported), this tool allows you surf internet anonymously and bypasses internet filters.
From my personal experience PaperBoy is a great one (at the time of writing), the only down side that I have noticed is there will be a new ads popping up on a new browser tab every 20 minutes.
As against similar tools, PaperBus allows you create a list of websites you don’t want to surf through PaperBus or anonymously.
The tool is very simple to use, just install, restart your browser, that’s all. Moreover it supports all operating sytems -Windows (Firefox/IE), Mac OSX and Linux.