GWT (Google Web Toolkit) is described as 'GWT is a development toolkit for building and optimizing complex browser-based applications. GWT is used by many products at Google, including Google AdWords and Google Wallet. It's open source, completely free, and used by thousands of enthusiastic developers around the' and is a Web Framework in the development category. There are more than 10 alternatives to GWT (Google Web Toolkit), not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and Self-Hosted apps. The best GWT (Google Web Toolkit) alternative is Jmix, which is both free and Open Source. Other great sites and apps similar to GWT (Google Web Toolkit) are Spring, Vaadin Framework, 10Duke SDK and Dropwizard.