Rename-It! can rename multiples files, that can be in different folders, at once. Rename files in seconds via the Explorer's context menu (Rename-It! incorporates in the Shell). Before renaming files, Rename-It checks the files' names. The renaming itself is done by filters: Search & Replace (replace a string by another and support regular expressions or wildcards), Case (make the file name uppercase, lowercase ...), Crop (only keeps a part of the file name), and ID3 Tag (reads the MP3 files ID3 Tag's info).
Free download Rename-It! - renameit-setup.exe