From hulubulu software:
Advanced Renamer Portable is freeware program for naming a large batch of files or folders in a snap. It uses several methods for creating the new names and it has tools for multimedia files like photo and music files. With Advanced Renamer Portable you can construct new file names by adding, removing, replacing, changing case, or giving the file a brand new name based on known information from the file.
Before performing the operations on the files you can verify that the output will be correct and if you perform the rename and regret it, you can undo the the complete batch.
What's new in this version:
Version 3.59 fixed bugs when changing case of unicode characters and error message when reading timestamp from file filename.