Google Docs is an online word processor that you can use for free with a Google account. With Google Docs, you can have access to your files from any computer with an internet connection. You can export a Google Docs file in MS Word format.
If you don’t have a Google account, you can sign up for one here.
If you already have a Google account (for gmail, etc.), simply login and use the “more” link at the top of the Google page to access “Documents.”