Randall Munroe, of xkcd comic fame, developed an interesting online tool.
Aptly named “Simple writer”, it is a text editor that highlights all the words in your text that are not in first 1000 most used English words (or rather lemmas, as it permits different forms of a word). This tool can possibly help simplify one’s writing style, should such a necessity emerge. And it is fun to play with.
While the first part of this message was written without trying to be simple, this last block was carefully looked into with the help of the simple writer thing. Not sure if it really makes the writing simpler but it sure takes more time to plan.