File RenamerScreenshot 


File Renamer will let you rename all your files and folders, but with a lot more options. Can batch rename files, add or remove strings to filenames, change file extensions, numerate filenames sequentially, convert to uppercase or lowercase, trim characters, replace strings, and some more.. Works with multiple directories, suports Drag and Drop and works from the command line. Also has `undo` function for last rename done.

Screenshot of File Renamer