All the above suggested softwares and tools are really great. You can also go for Mac Data Recovery software to undelete files on Mac OS X. This is great recovery software and recover and restore all deleted files only with few clicks of mouse.
Various files are fully supported by powerful data rescuer, such as documents, photos, music, videos, emails, archives and more. Portable devices like external drive, USB drive, SD card, memory card, digital camera, Music Player and many others are supported completely.
Know more detail From here :- http://www.filesrecoverytool.com/mac-data-recovery.html
Mac data Repairing Tool provide free scan or download facility to recover mac Database.
Find lost HFS file which deleted or formatted from Mac OS .
Any attempts to repair a Macintosh drive experiencing data loss with This Tool may result in permanent data loss.
Recover HFS+ data from any corrupted or formatted Mac hard drive.
Various files are fully supported by powerful data rescuer, such as documents, photos, music, videos, emails, archives and more.Get the more information to visit here: http://www.recoverydeletedfiles.com/mac-data-recovery.html