Solutions For PC:
TestDisk is a free data recovery utility. It was primarily designed to help recover lost data storage partitions and/or make non-booting disks bootable again when these symptoms are caused by faulty software, certain types of viruses or human error (such as accidentally erasing a partition table
Free to try
Download the trial version and recover your files. You can preview your data to be sure it actually works. If you like the results you do not need run the program again. Purchase the license key and enter it into the open program. Then copy everything you need!
Kroll Ontrack award winning data recovery software products are built on the same data recovery technology and techniques that make Ontrack Data Recovery the world’s most trusted data recovery solutions provider
Solutions For MAC:
Compatible with Snow Leapord. Not free
* Snow Leopard 10.6 support
R-Studio for Mac is specially designed for Mac OS environment and recovers files from HFS/HFS+ (Macintosh), FAT/NTFS (Windows), UFS1/UFS2 (FreeBSD/OpenBSD/NetBSD/Solaris) and Ext2/Ext3/Ext4 FS (Linux) partitions. It also recovers data on disks, even if their partitions are formatted, damaged or deleted. Flexible parameter settings give you absolute control over data recovery.
Best Of Both Worlds:
SpinRite is able to operate on all Windows XP NTFS formats, all DOS FAT, all Linux file systems, Novell, Macintosh (if temporarily moved into a PC) or anything else — it can even be used to repair and recover the hard drive from an ailing TiVo!