File Renamer is a way to rename multiple files. Select any group of files in a folder and do what you want -- change the file extension, make all names lower/upper case, replace or delete characters, add prefixes and suffixes, or replace the names altogether with sequential names of your choosing. You can also increment files by date as well as make names all caps or proper case. A must for large renaming of files.
Mac OS X 10.1 or later