Convox for AWS: https://convox.com/

There are a lot of contenders. Cloud Foundry is one of the many, you'll see others (Flynn, Deis, OpenShift, I always miss a zillion) mentioned in this discussion.

I like Cloud Foundry because I work on it. It runs on AWS, Azure, GCP, OpenStack, vSphere, RackHD and others. If someone wrote a BOSH CPI for DigitalOcean it'd run there too without much fuss.

Disclosure: I work for Pivotal, we donate the majority of engineering on Cloud Foundry.

Supergiant.io works for AWS, Digital Ocean, and Open Stack: https://supergiant.io/tutorials

Don't think so. Though their stack are open source.

Self hosted Docker Cloud / machine.