UTC 

UTC is a little utility with only two functions: convert a Unix timestamp (seconds since January 1st 1970 to date) to a human readable DateTime format and vice versa. So simple it does not need a help file or further information.
converter unix seconds delphi source code datetime

AttributeMagic Pro 

Change file/folder date-time and attributes en masse. You can set/reset attributes, Accessed, Modified, Created dates, JPEG/EXIF metadata, MS Office document properties, NTFS streams. Date-time shifting, masking, assignment, directory printing.
directory folder file attribute date time date-time modify created accessed stamp change modify tree