Textreme lets you perform almost any text data format conversion. The program is able to replace multiple patterns, in one or multiple files, easily. Built right on top of PERL's RegEx engine, this app supports all PERL RegEx. You may easily choose for which search patterns you want to allow RegEx support or make case sensitive.
Textreme is bundled with a set of useful templates to help you get started, but you can also save your favorite pattern sets as templates.