Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
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.
Google Cloud Functions - A serverless platform for building event-based microservices.
Now Platform - Get native platform intelligence, so you can predict, prioritize, and proactively manage the work that matters most with the NOW Platform from ServiceNow.
Pivotal - Pivotal Software provides enterprise PaaS-based solutions.