RenamePicture renames pictures according to the date-time information found in EXIF saved in picture. All you have to do is to select the folder containing the pictures and hit the button. This way you will never have totally irrelevant or duplicate filenames.
Full Specifications
What's new in version 2.0
General
ReleaseJuly 25, 2011
Date AddedJuly 25, 2011
Version2.0
Operating Systems
Operating SystemsWindows 2000, Windows Vista, Windows, Windows 7, Windows XP