Clever Cloud - Clever Cloud helps developers deploy and run their apps with bulletproof infrastructure, automatic scaling, fair pricing and other cool features.
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.
Pivotal - Pivotal Software provides enterprise PaaS-based solutions.
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
Salesforce Platform - Salesforce Platform is a comprehensive PaaS solution that paves the way for the developers to test, build, and mitigate the issues in the cloud application before the final deployment.