F2: Fast And Safe Batch Rename Tool For The Command Line (Cross-Platform) - Linux Uprising Blog
8 Freeware To Batch Rename Multiple Files in Windows
There is a great, free (not fake free, but really free) bulk file re-namer utility that everyone should know about. You can re-name hundreds of files in seconds which is good if
How To Batch Rename All Of Your MP3 Metadata Files