Today marks the first public release of forms, a Racket library for web form validation. Racket's formlets module from the standard library already does something similar, but, unfortunately, it lacks any facilities for easily showing validation errors to end users which is a big part of what I want from this kind of library. Another nice thing about this new library is it'll be able to validate things other than forms -- like JSON -- soon!
I hope you check it out, and, if you do, let me know what you think!