Here are some key features of "Metamorphose":

· Preview every item to be renamed before comiting changes.
· Add any number of operations in any order
· Load all files in directory and in subdirectories (recursive renaming).
· Undo renaming operation in case of mistakes.
· Regular expression support throughout.
· Rename MP3 files according to their ID3 tags.
· Rename image files according to their Exif tags.
· Full unicode support means any character from any language can be used.
· Use of all allowed characters under Windows and OSX, all except ':' in Linux.
· Preview images
· Save all program settings to file for later use.
Renaming operations, which can apply to name and/or extension :
· Prefix
· Suffix
· Replacement, modification, or move by: Character, position, or regular expression.
· Insertion by : Position or every (number) characters.
· Length modifications (padding, truncating, or both).
· Renaming styles : combination of: user text, numbering, audio tags, date, time.
· Modifications : UPPERCASE, lowercase, Capitalize first, Title Style, sWAP cASE, 'DoRkIfY'
· Move by position, text, or regular expression.
Sequential numbering (enumerating) options :
· Use integers, alphabetical, or roman numerals
· Use padding
· With integers, use any character to any fixed width, or auto pad.
· With alphabetical, auto pad in this format : aaa, aab, aac, ... aba, ... ygr, et cetera
· 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.

Requirements:

· Minimum screen resolution: 1024 x 768