By installing and running a client application that syncs the local file system and cloud storage Cloud9 can be run locally. Great alternative for situations when the Internet connection is unreliable.
CodeAnywhere recently partnered up with DigitalOcean. Now users can manage, spin up and provision DigitalOcean droplets all from the CodeAnywhere IDE. This is a great addition for both products, combining the power of an affordable host with the portability and power of CodeAnywhere IDE.
Anyone can get a free virtual machine (VM) with Ubuntu that has root access, apt-get, and many commonly used web tools. (most services offer this) The virtual machine shuts down after the user has been logged out for 60 minutes, but the state is preserved. Pro plans get an always-on VM.