I really didn't care for the form validation options available for jQuery, but I love the MooTools plugin, FormCheck. So I wrote this for jQuery that parses classes in the same way (but without the single quotes because I do not like them), and does some other stuff. This currently is not nearly as awesome or as complete as FormCheck, I'm not kidding.
This code is relatively old, not full-featured, and was programmed for jQuery 1.2.6. There's no support for radios, selects, options, and who knows what else. I would love for somebody to fork it and make it way cooler, that's why I stuck it up on GitHub. If I see the need in the future, I'll update it and write some light documentation. For now, it is what it is.