Not a Gripe :)

http://www.kwarp.com/portfolio/grammarninja.html

Grammar Ninja - it has sound (but I LIKE it). Identification of parts of speech... now, it has a disclaimer, saying it's a high school student's project, and I suspect some of the labels may be arguable because there are probably more specific terms than noun, pronoun, article, verb and conjunction, but they are intuitively logical. Thus "their" is an adjective... not a "possessive pronoun." I like it.