From Repair Kit:
This Photoshop repair .psd file software never modifies the damaged source, thus giving the user an opportunity to use alternative recovery methods if the recovery results are unsatisfactory. PSD Repair Kit is supplied in the form of a compact installation file that tales just seconds to download and requires absolutely no third-party components. The product is an invaluable addition to the collection of any graphics professional or system administrator dealing with Photoshop file corruption on a regular basis and trying to find an answer to the question how to repair Photoshop file?
The key features of this PSD file repair software are:
1. A powerful proprietary file analysis engine capable or restoring the most seriously damaged files
2. Support of Adobe Photoshop files of version 3 and above
3. Extremely modest system requirements
4. An intuitive interface comprised of several simple steps that even novices can cope with
5. Accurate data recovery to a new PSD file (does not require a copy of Photoshop to be installed on the user's computer)
6. Full compatibility with the most popular versions of Windows and completely standalone operation - no framework or library downloads required
7. A convenient built-in damaged file browser
8. A complete log file shown after each recovery session.