Slick Write is a powerful, FREE application that makes it easy to check your writing for grammar errors, potential stylistic mistakes, and other features of interest. Whether you're a blogger, novelist, SEO professional, or student writing an essay for school, Slick Write can help take your writing to the next level.

Where they're located: Anaheim, California, USA
Website traffic: 110K/month

4. EssayEdge

EssayEdge provides professional essay editing and proofreading services for college and graduate school applications and academic papers. Check it out!

5. Typely

Typely is a free online proofreading application that helps you write better English

Where they're located: Fresno, California, USA