Ant Renamer is a free (really free, i.e. the source code is available) program that makes easier the renaming of lots of files and folders by using specified settings. It supports Unicode names.
Browse the links above this text to get more information and download the program.
If you want to make a donation, you can do it with a Paypal account or a credit card by clicking the picture bellow:
You can subscribe to receive an e-mail that notify you when a new version of Ant Renamer has been released.