OpenShift is a Platform-as-a-Service (PaaS) product from Red Hat, Inc., a leading open source technology software outfit based in Raleigh, North Carolina. OpenShift is both a cloud platform and a free application that you can run on your hardware.
OpenShift Enterprise 1.0 is the next phase in the growth of the platform, and makes it available for small and big businesses to deploy and maintain it on-premise.
From the official announcement:
OpenShift Enterprise is built on a trusted stack of open source-based Red Hat technologies, including Red Hat Enterprise Linux, JBoss Enterprise Application Platform and OpenShift Origin, the basis for Red Hat’s existing online OpenShift PaaS service that has been available in a free beta since May 2011. With the inclusion of JBoss Enterprise Application Platform 6, OpenShift Enterprise becomes the only Java EE 6-certified on-premise PaaS available to enterprises today.
OpenShift Enterprise also benefits from the consistent innovation and contributions driven by the open source Origin project community focused on OpenShift. As a polyglot, or multi-language, PaaS, OpenShift Enterprise supports Java, Ruby, Python, PHP and Perl and it includes a cartridge-based architecture to enable customers to include their own middleware services.
You may read the complete announcement here.