Google App Engine
Google App Engine is a Python-based cloud hosting service provided by Google since April 2008. It allows one to host WSGI-compliant web applications on Google's servers, and pay them for scaling. The server provides a programming interface to a data store, a memcache, URI fetching, mail and authentication with Google accounts (as used for Gmail, YouTube, Blogger etc.). Two frameworks are offered for developing applications on App Engine - webapp and Django. webapp is a very simple framework and is used for building very simple App Engine applications like read-only APIs, while Django is used for bigger web sites and applications.