Products Glass Explorer Edition Guides Tools and Downloads Here, you'll find additional tools and downloads that you need to develop for Glass. To start developing with the GDK, head over to Setting up the development environment. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated May 22, 2015.