This looks interesting

[dagronrat]

http://www.hemingwayapp.com/

FS I think this might interest you too.

It "is a writing checker that is absolutely brilliant.

checks all spellings for you
checks if you’re over-using adverbs
picks out over-complicated sentences
suggests replacements for over-complicated phrases
picks out the passive voice
tells you how readable your text is (Grades/College level/etc)
calculates reading time"