AppScale is a platform that allows users to deploy and host their own Google App Engine applications. It executes automatically over Amazon EC2 and Eucalyptus as well as Xen and KVM. It supports the Python, Java, and Go Google App Engine platforms.
appengine-rest-server is a drop-in server for Google App Engine applications that exposes your data model via a REST API with no extra work.
Public domain general-purpose libraries.
An all-in-one Internet application suite.