Free disk recovery software for mac

Disk Inventory X is a disk usage utility for Mac OS X. It shows the sizes of files and folders in a special graphical way called "treemaps".
If youve ever wondered were all your disk space has gone, Disk Inventory X will help you to answer this question.
Enhancements:
New features:
- Finder context menu plugin with a "Open in Disk Inventory X" command for folders and volumes (must be installed manually in the preference window!)
- a new selection list which can show all files of a specific kind or all all files (to show the selection list, use the new context menu in the kind statistic or select menu "Window->Selection List")
- an option whether the assignment between colors and file kinds are shared between open windows or not (so every kind has in all windows the same color - like before - or the assignment is done for each window separately)
- performance improvements when dealing with a large number of files
- sortable columns in the kind statistic drawer (and in the new selection list, of course)
- a warning is shown prior deleting a file or folder on a network volume (items on a network volume can only be deleted, not moved to trash)
Bug fixes:
- DIX crashed when refreshing a file or files if DIX has zoomed into a folder
- the "select parent" shortcut did not work if the file view had the focus: the shortcut is now changed to Apple-U (previously Command-P).

Disk Label Creator lets you can create your own beautiful and professional 3.5" disk labels.

Disk First Aid Doubler is a small application that lets you shorten or eliminate the 2-minute delay after the startup disk check under Mac OS 8.5 and later.
Completly freeware for non-commercial use.
Enhancements:
- Fixed conflict with Default Folder.