Look for tools like Recuva and Test Disk. Both are great file recovery tools. Sometimes a little complex... but remember the number 1 rule... DO NOT WRITE TO THE DRIVE EVER if you want to try to recover data off of it.
http://www.easeus.com/resource/unformat.htm
you haven't written any data to the drive yet/after the format?
overwritten files are harder to recover.
Going to give this a shot. Looks easy to use.
CROSSING MY FINGERS!
Just be warned... almost all of those data recovery tools you see will perform a scan (free version) but require you to pay if you want to copy or retrieve any actual data. I've used them before and most are like a hit or miss.... with maybe like a small handful of files out of hundreds of photos..