Batch File Utility 

Batch File Utility is a folder and file renaming utility,that supports wildcards and regular expressions with a variety of renaming features,including options to change case, replace strings, set file attributes, rename mp3 files.
file renamer mp3 renamer batch file compress batch file rename batch file utility batch file rename utility

A Better Finder Rename 

A Better Finder Rename is a contextual menu plugin for the Macintosh Finder, which allows users to quickly rename multiple files.
file renamer finder extension context menu contextual menu plugin file utility

Better File Rename 

Better File Rename is a powerful Windows Explorer enhancement that transforms the tedious and time-consuming task of renaming multiple files into a simple matter of seconds. Ideally suited for Digital Camera Owners, webmasters, graphics professionals and many others.
windows explorer shell extension rename file