Dropbox Paper is an online documentation tool.
If you sign up for Dropbox, you automatically get Dropbox Paper for free. Dropbox Paper is a documentation tool that allows you to embed videos, GIFs, images and more. This makes it ideal for multimodal writing. Dropbox Paper is also very useful for collaborative writing and e-feedback. You can add contributors to your paper who can give feedback and/or make adjustments.
Example of an assignment using Dropbox Paper:
The New York Times is looking for ways to appeal to a younger audience. You and your partner have been asked to write a news article on a recent news story, using multiple types of media (images/videos/hyperlinks/GIFs). Together, write the news article in Dropbox Paper and incorporate relevant media.