You can set up a git server on your droplet and have it auto-deploy when Cloud9 pushes to it: https://www.digitalocean.com/community/articles/how-to-set-up-automatic-deployment-with-git-with-a-vps.

You can easily connect Cloud9 to a Digital Ocean VM. There is a good documentation how to do it at

https://docs.c9.io/run_your_own_workspace.html

There is HiveMind, you can find a quick install guide here:

http://blog.crudzilla.com/2014/04/hivemind-on-digital-ocean-droplet.html

Hi,

You can checkout www.sourcelair.com, where you can set up DigitalOcean deployment in 6-steps (s.lair.io/blog-deploy-digital-ocean). That means that you can use this feature to push your code to your DigitalOcean server, with a single click.

This might fit your needs.