Metamorphose

Métamorphose is a batch renamer, a program to rename large sets of files and folders quickly and easily.

With its extensive feature set, flexibility and powerful interface, Métamorphose is a profesional's tool. A must-have for those that need to rename many files and/or folders on a regular basis.
In addition to general usage renaming, it is very useful for photo and music collections, webmasters, programmers, legal and clerical, etc.