Wordprocessors

Editors
ThinkFree
Looks almost identical to Word 2003
Online Docs from Google
Has ability to share changes to document in real time
Office Web Apps on SkyDrive
Looks like Word 2007
Zoho Writer
Uses tabbed menus which brings up the appropriate button set on the toolbar much like Word 2007's ribbon
Acrobat.com Share and Create Files
Flash based word processor

TypingWeb
Free online typing tutor and tutorial website for all skill levels

Proof Readers - Annotators
Paper Rater
Provides users with in depth analysis of their papers. The application covers a lot of ground in terms of paper reviews. Users can detect plagiarism as well as spelling and grammar mistakes. PaperRater also analyzes style and word choices, validates titles and provides readability statistics. The user can also access an auto grader tool as well as a vocabulary builder. The vocabulary builder presents the user with a new random word, examples of its users and its definition. The site recommends that the user visit the PaperRater vocab builder daily to continue to grow their vocabulary skills.
Crocdoc
Comment on, edit, and fill out PDFs, Word documents, images and more. Highlight text and add comments using this online document annotator.