Heroku - Agile deployment platform for Ruby, Node.js, Clojure, Java, Python, and Scala. Setup takes only minutes and deploys are instant through git. Leave tedious server maintenance to Heroku and focus on your code.
OpenShift - OpenShift gives you all the tools you need to develop, host and scale your apps in the public or private cloud. Get started today.
tsuru - Tsuru is an extensible and open source Platform as a Service software.
Cloudify - Accelerating Software Development & Deployment
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Docker - Docker is an open platform that enables developers and system administrators to create distributed applications.