https://www.cnet.com/news/dropbox-launches-extensions-for-easier-workflows/

With the extensions, you can take a contract from first draft to final PDF to signature without the need to upload, download or scan anything. Then you can send the signed contract to someone else directly from the Dropbox file, according to the company's blog post.

You can also annotate or edit videos and images in Dropbox for real-time feedback. Dropbox automatically saves the updates back to your shared folders to keep your team in sync with the materials.