Google App Engine SDK
App Engine provides a variety of services that helps users to perform common management operations for an application such as URL Fetch, Mail, Memcache, Image Manipulation. The Google App Engine SDKs for Java, Python, PHP, and Go each include a web server application that emulates all of the GAE servicessuch as APIs and libraries, secure sandbox environment, checks for attempts to access system resources on your local computer, tool to upload your application to GAE. The Java SDK available as a Zip file runs with Java 7. With Eclipse IDE, Google Plugin for Eclipse can be used to create, test, and upload GAE applications. The Python SDK available as a Zip file runs with Python 2.7. It is implemented in pure Python, and runs on Windows, Mac OS X and Linux. The PHP SDK available as a Zip file with PHP 5.4 runs on any platform including Windows, Mac OS X and Linux.