Cloud Foundry is an open platform as a service, providing a choice of clouds, developer frameworks and application services. Initiated by VMware, with broad industry support, Cloud Foundry makes it faster and easier to build, test, deploy and scale applications. It is an open source project and is available through a variety of private cloud distributions and public cloud instances, including CloudFoundry.com. Cloud Foundry is an Application Execution Environment like Google AppEngine, Salesforce.com, AWS, Microsoft Azure, Engine Yard, Heroku e.t.c with a +

Why Cloud Foundry?

Developers AgilityNo one between you and your application
Friction-free way to develop, test and deploy applications. Cloud Foundry lets developers focus on writing their applications and not meddling with middleware and infrastructure. While providing self-service access to a choice of high productivity frameworks and application services, developers can quickly build and test next generation applications on their own laptop and scale to the cloud with no code changes.

Optimized Software DeliveryPortability without changes – Dev/Test/Production, Private/Public clouds
Write your application once, and test, scale and deploy to production without changing your code. Preserve cloud deployment options across private, public and hybrid clouds. Cloud Foundry enables applications architects and operation teams to reduce time to market by shortening the software delivery pipeline and reduce application backlog.

Open SystemThe freedom to choose
Cloud Foundry gives developers what they want…choice:

Feeling like getting started? Start Clouding now with Cloud Foundry

Related Article: http://www.wired.com/wiredenterprise/2011/11/cloud-foundry/all/1