Dropbox Upload - Download
Upload and share files with Dropbox
To use this workflow, you need to first install Dropbox Uploader script.
I put this script inside ~/Dropbox named upload.sh.
I then designated another folder ~/Dropbox/Shares as a place where I put all the files I want to share with Dropbox. This workflow assumes this structure and won't work if you don't have the above script inside Scripts dir with name upload.sh and if you don't have the Shares folder too. Of course you can change all of this and find a structure that works for you if you wish. I just share what I am using myself.
Inside the workflow there are 2 things. First, there is a file action that will take the given file, then put it inside ~/Dropbox/Shares, then share the file and give you a downloadable link of the file in clipboard.
The second is a script filter that will filter through the contents of ~/Dropbox/Shares and on enter will give you a downloadable link to the file. You can also delete the file from the directory and Dropbox with a modifier key press.