Sites and apps similar to My Unblock include CGIProxy, which is free for personal use. Other options are PHP Proxy, PHProxy (original), PHP-Proxy and PHProxy. In total there are five sites and apps like My Unblock for self-hosting.
This CGI script acts as an HTTP or FTP proxy. Through it, you can retrieve any resource that is accessible from the server it runs on. This is useful when your own access is limited, but you can reach a server that in turn can reach others that you can't.
PHProxy is a web HTTP proxy programmed in PHP meant to bypass firewalls and access otherwise inaccessible resources (i.e. blocked websites). If the server this script is run on can access a resource, so can you!
PHProxy is a web proxy for bypass proxy restrictions and get access to the Web sites blocked by PHP web host.
