Widgets are rich, Web applications running from your desktop. They are implemented using client-side Web technologies—creating one is a lot like creating a Web page, except that widgets run in a slightly different context and without the need for a Web browser.
Opera Widgets run outside the browser interface. In short, as long as you have Opera installed, you can run any widget you like, without ever opening the browser.
We regularly publish updated articles at Dev Opera, our developer-community resource site. Written by developers, these articles provide a great starting point for any kind of Web-based development.
For articles related to Opera Widgets, go to http://dev.opera.com/articles/widgets/.
To publish your widgets, go to http://widgets.opera.com/upload/.
Your feedback is constantly helping us refine and improve Opera Widgets. Leave your comments and suggestions.