There are quite a few data recovery applications available for download, they are generally free to install and will scan your drive producing a list of files that can be restored. The actual recovery requires buying the product and ymmv.

A quick google for data recovery download came up with many results, the first couple I found require payment through services I've not heard of setting off my alarm bells. It's always worth checking around the Web for opinions and issues and signs of outright extortion before downloading any software.

http://www.stellarinfo.com/download.htm accepts PayPal, $49, so may be a good place to start.