Grammar-based text-processing tools

Gentlemen, I'm looking for grammar-based text-processing tools such as convert formats based on a BNF grammar (like XSLT, only good, non-XML-based (free language)), or a form-based form-generating validating editor based on grammar (so for example, if you define the INI files grammar, you get an INI file editor).

I can do flex/bison, but I don't want to write C for every thing I need to do; I'm looking for tools that will do this. Any ideas?

>>3

Fails for tail-recursion being the only means of looping.  Ever.

It wouldn't bother me so much if it didn't stack overflow because of it on very large lists.