Outlook PST repair and recovery utility from Disk Doctors Data Recovery Software range of products use this tool to recover lost or deleted data, emails, contacts from corrupted outlook pst archives.

I heard about not bad application-pst_recover,
can process corrupted files with *.ost and *.pst extension and save the data, that can be extracted, can convert corrupted mailbox to another mailbox in *.pst format, it can be opened by any email client, compatible with Microsoft Outlook, can extract all files separately: *.eml, *.txt and *.vcf documents will be placed to any folder upon your choice, is compatible with all supported versions of Windows operating system, starting from Windows 98.