Grammarly is an automated proofreader that checks for grammar, punctuation, style, and plagiarism detection.
It is called “World’s Most Accurate Grammar Checker”. I haven’t tried it yet. However, there are some reviews:
- Grammarly Review by Sharon Hurley Hall
- Grammarly review from TopTenREVIEWS
- Grammarly vs. Whitesmoke – A Comparison