A more in-depth discussion of gadget programming is beyond the scope of this book. Suffice to say, you can create just about any type of application you can imagine and include that application in your iGoogle, Google Desktop, or personal web page. You can even use Google’s various APIs and API extensions to include Google applications and data in your gadgets. And it’s all open source, which means Google provides the APIs free of charge. Whether you’re a hobbyist, student, or professional application developer, it’s a great resource.