http://ytmnd.webspacemania.com/raw/
what it does is send a packet that you specify to a website.
Basically lets you recreate a hit to a website from another website.
Q) Why would you want to do this ?
A) a number of reasons, its quick way to test your website from another computer, or view the source of a website without actually going to it. You can also use it to show you the various cookie settings from your sponsors, check for ref codes etc fake your referrer or fake your browser agent ( usefull for testing stuff )
bookmark it , might come in handy sometime.