It is a free thing. I can't post here but PM me for a free one that's php based. like the source for the one Cossy posted. Don't like using people's online ones encase their leeching the accounts. Mr-R-T's is a good app based one.

Seriously RS has a great api. This can be made by any basic noob coder in 20 minutes. Rapidshare even give you instructions on how to create it here http://images.rapidshare.com/apidoc.txt