WriteURL is a free real-time collaborative rich text editor that requires no registration and is free to use. Sharing is as simple as emailing a URL. Collaborators get the write URL, live readers get the read URL. You can always publish a snapshot of the document as a web page with a publish URL. Collaborators can work simultaneously. Changes to the document are visible to all writers and readers in real-time. You can start new documents and edit existing documents offline. Changes to the document are saved on your device and sent to the server when possible.