https://koding.com
Hosted on Amazon
Koding VMs are essentially Amazon VMs which means they carry with them the dependability that Amazon's cloud infrastructure is known for. Your Koding VM will be an Amazon t2.micro instance.
Docker
Koding VMs are not sliced up hosts running LXC. This means that you can easily run advanced technologies like Docker and still keep your file tree clean.
Ubuntu 14.04
Koding VMs run Ubuntu 14.04 and come with all the default packages and software that ship with a standard Ubuntu image (plus we have added a few more goodies).