Not sure if this is exactly what you looking for but try ARTHA,
it's downloadable offline opensource thesaurus and dictionary, not sure if checks grammar too.
My goal is just a grammar checker application like MS Word Grammar Checker like MS Word Grammar Checker . I have spell checker, I only need a grammar checker application for my PC: a Win 7 64 bit. Please refer me to one which will solve this following problem for me. Best wishes!
I have a spelling chequer,
It came with my PC.
It plane lee marks four my revue
Miss steaks aye can knot sea.
Eye ran this poem threw it,
Your sure reel glad two no.
Its vary polished in it's weigh.
My checker tolled me sew.
A checker is a bless sing,
It freeze yew lodes of thyme.
It helps me right awl stiles two reed,
And aides me when eye rime.
Each frays come posed up on my screen
Eye trussed too bee a joule.
The checker pours o'er every word
To cheque sum spelling rule.

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