This is a great little service:
Slick Write is a free tool that checks your writing for potential stylistic mistakes and other features of interest. Whether you're a blogger, novelist, or student writing an essay for school, Slick Write can help take your writing to the next level. Curious? Try a quick demo, or enter your own text in the editor tab. After submitting, four more tabs will appear at the top of the screen:
I had a play around, and it broke my text into stats, critique, sentence flow and a whole bunch of funky little bits of information. It seemed to detect the style of the submitted text (ie. whether it was prose or an essay), and I assume it applies different rules to the text accordingly.
Certainly worth having a look at!
There's a limit of around 200,000 characters, or around 28,000 words. So the service reminds you to submit individual chapters if you are planning on smashing through your novel manuscript.
Try it out here: http://www.slickwrite.com/