So here's the first and foremost, under the rather nondescript name of File Renamer...
http://www.webxpace.com/software/freeware.shtml#FileRenamer wrote:Rename all your files, folders and shortcuts, with all shapes and options you will ever need. You can numerate files sequentially, batch rename, replace strings, modify strings, change dates, modify file's attributes, etc. Drag and drop all files and folders from explorer to it's window, has full, 'infinite undo' function - so you will always be safe, and you can also create your own more elaborated scripts, adding every kind of available option together, for repetitive and more complex renaming actions.
Download latest File Renamer release (currently v1.2.4.3) from www.webxpace.com/software/freeware.shtml#FileRenamer.