BonPatron.com – French grammar corrector.
Possibly one of the best French learning resources online, BonPatron is a French grammar corrector. Gone are the days of fretting about which French grammar rules you have forgotten, and in are the days of having BonPatron quickly proofread your sentences and catch your simple and common grammatical errors.
The site is entirely in French, and requires the ability to input relatively correct French sentences for it to work effectively. This may be beyond what a Beginner is looking for, but should be right up the ally of most Intermediate (and even Advanced) French learners.
Head over to BonPatron.com to take a look!