This is a great site that will help you correct your papers. It will also give you a weekly update on how much you have improved!
This site will let you know what grade you should get on your paper, it assess your writing style and conventions. I really like the added lessons it gives to help you do a better job.
This app lets you know a little about how you are structuring your sentences. It gives you a good idea of where a reader might find your paper difficult to read.
Copy and paste your writing into this site and get feedback on how to edit your paper.