Good thing come at a price. You can give a try to Stellar Phoenix Macintosh - Data Recovery Software not free but a good utility which recovers data from damaged, deleted, or corrupted volumes from Mac machine. Support HFS and HFS+ file system.
Download the demo to try : http://www.stellarinfo.com/mac-data-recovery.htm
I accidentally "erased" my external hard drive from Disk Utilities and I would like to try and recover my files, but I see that all of the data recovery software costs around $100. I was wondering if anyone knows of any decent data recovery software that is either free or cheap?