Oracle TimesTen - TimesTen is an in-memory, relational database management system with persistence and...
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Datomic - The fully transactional, cloud-ready, distributed database
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.
Matisse - Matisse is a post-relational SQL database.
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.