>
> We need in Emacs a free grammar checker that really is up to the job, 
> not just any free program.  The result should be Emacs features that we 
> can be proud of.
>

It's clearly not as accurate as non-free grammar checkers, but it does a 
reasonable job.  I don't know if that's enough to be proud of it.  To give 
you a feeling of what it does, I attach the 18 potential grammar errors it 
detects in CONTRIBUTE.