TEConverter
It can help you convert your text files from its original encoding to everything
Ever seen messy code from text files downloaded from the Internet or created by a Mac ? That's the encoding and decoding problem!
TEConverter (Text Encoding Converter) is an easy to use Mac OS X app that can help you convert your text files from its original encoding to whatever encoding you want (UTF-8 is definitely the best choice).
This way you will be able to view those files using any text editor on your Mac.