"Google just announced that its Apps Script scripting language is now open to all users of the Google Apps Standard Edition. Until now, Apps Script, which allows users to create scripts that automate common tasks in Google Docs, was only available to paying Google Apps Premier and Education Edition users."
"Google Web Toolkit (GWT) is a development toolkit for building and optimizing complex browser-based applications. GWT is used by many products at Google, including Google Wave and Google AdWords. It's open source, completely free, and used by thousands of developers around the world"