I had a look at the Grammarly automated proofreader and personal grammar coach that claims to be the world's most accurate grammar checker, presumably in the automated category. The bad news is that those who want to post any text and expect it to be turned into perfect English will still have to wait for science fiction to become reality, but the good news is that it could be a very useful tool.
Categories: General
Tags: grammar checker, proofreader

There have been "grammar checkers" since the early days of Word Perfect but I have never come across one that works well enough to be trusted. I have always liked Roget's Thesaurus. Such "helpers" can suggest alternatives to a writer with limited vocabulary but it is always necessary to proof read for grammatical correctness after any substitution, especially if a phrase is suggested rather than just a word.
The best answer is to become more proficient in the English language. It is a very flexible language which can retain meaning after extremely bad usage whether spoken or written.
They have their limits, but I think some are at the stage where they can be seen as a useful tool, especially when people don't have proofreaders to hand.
Hi Tdol,
Just to let you know there are other grammar checkers available in the market too. I am from Ginger Software which developed similar product like Grammarly and I happen to chance upon usingenglish.com when trying to find reviews of other grammar checkers.
Similarly to Grammarly, Ginger Software does spelling and grammar correction based on the context of a sentence. It also have the feature of a personalized learning tutor where it generate reports of common grammar errors which users make, and provide multimedia lessons and quizzes for learners to improve their language usage.
You can download our time-limited trial from our website.
http://www.gingersoftware.com/download_premium/
We'll be glad if you can review our software here on usingenglish.com. You can even consider doing a unbiased comparison review between both software. Ginger Software will be up for the challenge. :)
I have replied and will take a look at Ginger Software's software.
Joy mentioned about similar product like Grammarly and I want to inform all of you that soon will start to work for FREE new grammar checker - GrammarBase. They will check for grammar, punctuation, style, plagiarism and contextual spelling. My friend informed me about it and he doesn't recommend something bad.
Another on-line grammar checker is GrammarTool -- you might want to check it out too.