Google Docs

Google Docs is a free, web-based word processor, which is part of an office suite offered by Google within its Google Drive service. It serves as a collaborative tool for editing documents in real time. Documents can be shared, opened, and edited by multiple users simultaneously and users are able to see character-by-character changes as other collaborators make edits. They are automatically saved to Google's servers, and a revision history is automatically kept so past edits may be viewed