You require TWO THINGS:
1) another drive with enough space to copy over any data you find
2) a program to recover data from a formatted drive. You can look for free software however I had the best success with this program:http://www.easeus.com/datarecoverywizardpro/
Here's how it works:
Step 1 - run the software and have it SCAN the formatted drive for files
Step 2 - Select the files it finds and COPY that data to your other hard drive
Step 3 - Verify the files you copied over aren't corrupted then ORGANIZE them into folders.