Red Hat OpenShift is a PaaS having Apache License 2.0. It has built-in support for Java, Python, PHP, Perl, Node.js, Ruby, and extensible functionality to add languages. It supports MySQL, PostgreSQL, and MongoDB. It supports web-application frameworks such as Rack for Ruby, WSGI for Python and PSGI for Perl. For Java, it covers end to end support for Java EE6, CDI/Weld, Spring, Liferay, Scala/Play!, JBoss AS7, JBoss EAP6, Tomcat 6 & 7 (JBoss EWS 1.0 & 2.0), Glassfish as DIY, Jetty as DIY, Eclipse, JBoss Tools, Jenkins, Cloud9 IDE, Appcelerator Titanium, Git, SSH access, Maven 3, and Ant. There are three versions available: OpenShift-Online, OpenShift-Enterprise, and OpenShift-Origin. Free tier is available for it Online with 512 MB RAM and 1 GB disk. Enterprise edition is a private cloud version from Red Hat.