RenWiz is a file renamer utility that was designed to make it as easy as possible to rename many files at once. It's forte is the intuitive interface. You have to try to understand.

Rename many files at once. Add, replace and delete characters; enumerate; change extension; change case; capitalize; and more with this utility.

With as many files as you want, you can do the following:
Load and Rename more than 100 files per second!
Always see the preview of the new filenames on the screen
Insert, delete or replace a letter or a number in a specific location in the filename (position)
Picture preview when you click a file in the list
Rename folders
add a whole folder with or without the sub folders
Add a file, a few files or a whole folder from windows explorer by right-click(Shell Extension)

What changes can you make to filenames?
Add text to filename at any position
Delete text from filename at any position or occurance
Replace text in the filename at any position or occurance
Change Extensions
Change Case in various modes
Enumerate with preceding or following characters
Add or change date and/or time
Change File Attributes

If you rename more than 1000 files regularily, inquire or lookup the help on Expert Mode. RenWiz dealt with renaming over 50K files at once on various operating systems...

The license of this software is Free Trial Software, the price is $29.99, you can free download and get a free trial.