After being abandoned by Google and being made it available to the open source community, the App Inventor for android is now supported by MIT. It will now be called as MIT APP Inventor. As of now it is in the beta stage. App inventor offers a simple WYSIWYG interface to develop application for android by just dragging and dropping the programming blocks.You can try MIT app inventor at http://appinventor.mit.edu/. You can use your google account to sign up for the MIT App Inventor.