how to check for proper grammar

The advantages of SCRIBENS
Scribens provides definitions, conjugations, and synonyms with an accompanying dictionary and thesaurus.

Do not hesitate to send us your feedback on the results of the spelling and grammar check. This way, you will enable us to improve our service.
Contact us if you want to implement a spell-checking tool adapted to your company (for French, English or other languages). If you are looking for a PC product, we recommend Ginger.

Your number one choice if you are looking for a free, online grammar check
If you use a good desktop publishing program such as Microsoft Word, you might be wondering why you need to use a grammar checker at all. These programs have their own spell check tool right?

Don’t let incorrect grammar get in your way. Start using Ginger Software today!
Click here to learn more about the advantages of using an online grammar checker.
With Ginger’s grammar checking software writing is quick and easy. You’ll never need to ask others for help with rules of English grammar. Use Ginger’s Grammar Checker to correct your texts and download Ginger’s full suite of products to listen to your texts and learn from your own mistakes to avoid repeating them in the future.

The Virtual Writing Tutor can help you improve your paraphrasing skills quickly. Here’s how. Draft your paraphrase, click on the Paraphrase Checker button, and copy-paste the source text into the text box. Click Check, and the paraphrase checker will compare your text to the original text. It will underline words and phrases that are common to both texts. In addition, it will calculate the similarity of the two texts with a score. For optimal results, check one sentence at a time, and aim for a paraphrase score below 50%. See the paraphrase checker page for more information and a sample text to try.
Try the Paraphrase Checker the next time you want to use other people’s ideas in your writing. Remember that ideas are free, but the expression of those ideas is owned by the original author. Good writers must, therefore, learn to paraphrase effectively and give credit where credit is due to avoid accusations of plagiarism. Remember that it is very easy for professors to catch plagiarism these days.

References:

http://www.reverso.net/spell-checker/english-spelling-grammar/
http://jcme.ca/
http://www.gingersoftware.com/grammarcheck
http://virtualwritingtutor.com/
http://www.scribens.com/mobile.html