Oscar's File Renamer
http://www.mediachance.com/free/ renamer.htm
= must have
Software Utility (Win)
FREE

The Renamer takes and enhances the idea of editing files in directory in a full featured text editor and then writing all the changes at once into the files.

It works simple: Open Renamer, select directory and the files will appear in the File Name Editor which is a normal full featured text editor with some additional changes (f.e. you can't add or delete line).

You can use all the editor functions like Quick find, Replace, multiple Undo/Redo, Macros and of course normal editing.

Each file is on a new line and can easily move with arrows like in a normal text. When the files you wanted to rename are done simply click Apply Changes and all files will be physically renamed.

PROS:
Fast Editing of long list of file names - exactly like in a text editor. All changes to files themselves are done at the very end when you press Apply Changes, not during editing.

During Editing you can use Undo/Redo, and various tools like
Upper Case/Lower Case or numbering.

All changed lines are visibly marked.
It doesn't let you enter wrong characters.

A File List shows the original names on the disk.
You can undo changes even after you write to disk.

CONS:
It doesn't work with files that contain spaces. (I have always said not to put spaces in your file names. Use the underscore "_" character instead.)

Download at:
http://www.mediachance.com/free/ renamer.htm