Timelapse is a cool website where it shows how the world changed through 3 decades using Google satellite. It's interesting how were expanding, such as deforestation, melting glaciers, and man made islands. This site shows how big human impact really is on this planet.
I've used the site for whenever I'm editing an essay. Unlike Word Document it won't pick up on certain grammar, or repetitive words in your essay. I find it really helpful and the best part is that it's free.