Writing Tools for Authors
Obviously, every author needs a word processor.
I know in this day and age you can use Google docs, and I have used them for some blog projects, but I simply love Microsoft Office and use it for all of my books.
Scribens is a free online tool you can use to check your grammar. You copy and paste your text onto their website, and it will check for a whole host of issues; run-on sentences, comma overuse, word repetitions, cliches, punctuation, spelling, and so much more. They also have an extension for checking your online writing, and to use with Microsoft Office as well.