Main Features: * Renames files and folders at the same time. * Preview every item to be renamed before comiting changes. * Load all files in directory and in subdirectories (recursive renaming). * Undo renaming operation in case of mistakes. * Rename MP3 files according to their ID3 tags. * Use of all allowed characters under Windows and OSX, all except ':' in Linux. * Save all program settings to file for later use! * Renaming operations: 1. Prefix 2. Suffix 3. Set file extension. 4. Replacement, modification, or move by: Character, position, or regular expression. 5. Insertion by: Position or every (number) characters. 6. Length modifications (padding, truncating, or both). * Renaming styles: combination of: user text, numbering, id3 tags, date, time. * Modifications: UPPERCASE, lowercase, Capitalize first, Title Style, sWAP cASE, 'DoRkIfY' * Move by position, text, or regular expression. * Sequential numbering (enumerating) options: 1. Use integers, alphabetical, or roman numerals 2. Pad with any valid character to any width.(integers only) 3. Control step size, starting number, reset count. * Set date and time manually or get from system. * Use supplied defaults or specify your own date and time formats. * Modular design allows great flexability and control, while keeping the easy stuff simple. * Python and open source (GNU-GPL) means it's quickly, easily, and legally customizeable to fit your needs. Read the License for more details.