Mayer, Marissa (June 20, 2013)."So What Do You Do, David Karp, Founder of Tumblr?".

Karp, David (December 12, 2011).Ludwig, Sean (August 26, 2011).

The New York Times.It is a live feed of recent posts from blogs that they follow.See for yourself why over 10 million users are hooked on Grammarly's free writing app.