Google Docs & Spreadsheets

Google Docs & Spreadsheets is a free web-based word processing and spreadsheet program that allows you to create and edit documents from anywhere and collaborate with multiple people at the same time. You can take advantage of Google Docs & Spreadsheets to coordinate your student group's homework assignments, access your family to-do list from work or home, or work with remote colleagues on a new business plan. Import existing documents and spreadsheets, or create new ones from scratch. To invite people to view or edit a document, simply add their email addresses to the list of viewers or collaborators. Take a peak at how a document is shaping up, or contribute your thoughts to a draft in progress. Keep track of multiple versions in one place--with an easy drop-down menu that shows who changed what, and when. If you would like to keep a copy on your hard drive, you can export to a number of popular formats (DOC, XLS, ODT, ODS, HTML, PDF, etc.). Or, easily publish your work to a web page or blog for the world to see.

http://docs.google.com