Dropbox Uploader is a BASH script which can be used to upload, download, delete, list files (and more!) from Dropbox, an online file sharing, synchronization and backup service.
It's written in BASH scripting language and only needs cURL.
Click on the fork link above to read about the original.
I needed to put this into production and the original didn't have set -u, proper quoting, help, delete after transfer, lftp style logging, wildcard matching, directory recursion, retry logic, or unit testing to show that everything works properly. I implemented them them all.
I implemented APIv2 as soon as it was advertized. AF implemented it later and so far as I know the config files are not compatible. You'll need to reregister or edit the config file to switch.
This is version you get with the Arch Linux AUR package.