IBM Application Server on Cloud for Bluemix provides a virtual machine instance where you can use a simple Bluemix portal to create and manage enterprise WebSphere® Application Server deployments in a consistent and repeatable manner with significant flexibility to tune your application.

Application Server on Cloud for Bluemix delivers:

• The option to purchase service either on an hourly basis or through a long term Bluemix subscription
• A simple way for applications, which are based on traditional WebSphere Application Server, to move to the Bluemix platform
• An independent application environment that is preconfigured and tuned to WebSphere Application Server

Find out more here.