Grammar Checkers

PaperRater

http://www.paperrater.com/free_paper_grader
PaperRater.com is a FREE resource, developed and maintained by linguistics professionals and graduate students. It analyzes documents immediately, 24/7, in real-time. We provide in depth analysis to help the student improve grammar and writing. Some of our features include:
  • Plagiarism Detection
  • Auto Grader
  • Spelling and Grammar Check
  • Style and Word Choice Analysis
  • Readability Statistics
  • Title Validation
  • Vocabulary Builder tool


Spell Check Plus

http://spellcheckplus.com/
The free version (w/ ads) of the site allows user to submit texts up to 500 words. They recommend you split your document up into batches of 5 or 6 pages and submit them separately if you don't want to pay for the PRO version ($15). They also sell a mobile iphone App for $5.99 http://itunes.apple.com/us/app/spellcheckplus-mobile/id441512362


After The Deadline

http://www.polishmywriting.com/
Grammar, usage, and style checker inspired by The Times's style manual.
In addition to the online version, After the Deadline is available as:


Whitesmoke.com

Free Online Grammar Checker (w/ads)
http://www.whitesmoke.com/free-online-checker
A web application that allows you to check your grammar, spelling, and writing style for free!


Grammarly

http://www.grammarly.com/
An automated proofreader and your personal grammar coach. Check your writing for grammar, punctuation, style and much more. This is the free online version (http://ed.grammarly.com/editor/view/?f=1). They also have a 7-day trial and paid versions.