I came across this website today. It’s essentially Turnitin.com, but for students and free. It checks your grammar, spelling, style, and word choice: perhaps with this, people will ask me to proofread their essays a little less often.
Check it out, and see if it works for you. The website is very intuitive, and should be easy to use at first glance.
You saw this on lifehacker didn’t you?
Yep. It’s been digg-effected though: since it’s a rails site, and its not running on the fastest servers, it goes down every few requests. Not great, but if you try two or three times you’ll get through.