Opera

To start developing Opera Unite applications, you need some knowledge of common Web technologies, such as HTML, CSS, and JavaScript. All applications submitted for publishing on unite.opera.com are reviewed by Opera Software to check for errors and to ensure that they comply with the terms and conditions. For more details, see the Opera Unite articles, the File I/O API specification, and the Unite API specification on dev.opera.com.

Note: Some of the new APIs are still experimental and are yet to be standardized. Expect some API changes as the specifications and implementations mature.

As an application author, you can publish your Opera Unite applications on unite.opera.com to share them with thousands of users around the world quickly and easily. These users can provide you with feedback and bug reports to help you make it even better.

See the Opera Unite Developer's Primer on dev.opera.com for instructions.

No. All applications published to unite.opera.com are absolutely free of charge to download and install. You could potentially charge for applications that you create and distribute yourself.

No. The Opera Unite catalog at http://unite.opera.com is currently a free resource. Users can download and install applications from here completely free of charge.

When you publish your application, we unpack it and test its contents before repacking it and putting it on the server. This may lead to some differences in compression and file size. Additionally, if you change the application information in the Configure step, this information is put back into your zip file. Finally, Opera Software reserves the right to update or correct the description fields at any time.

See the terms and conditions on the Publish page. Please be aware that these terms and conditions apply to publishing applications only. For information about terms of service for end-users, see Does Opera Software claim any rights over content on my computer?.

No, once a application is published, you cannot delete it. We prefer not to interrupt the running of that application for users. If there is an error or problem with it, Opera Software may remove it.

All applications need to be reviewed by Opera Software to check for errors and to ensure that they comply with the terms and conditions. This ensures that our users have an enjoyable and safe online experience. We do not take responsibility for the content of the applications or make any guarantees about the functionality. See our disclaimer. Of course, you are free to offer Opera Unite applications for download from your own site, however, as this avoids our approval process, we will not be able to review the applications to ensure that the they will work correctly.

You will have received a message stating what terms or conditions the application breaks or other issues encountered. Fix these issues and submit the application for publication again, and we will review it. See the terms and conditions on the Publish page.

When a user reports a bug, it is shown in a link marked "Assigned issues". As the author of an application, you are responsible for fixing any bugs. Opera Software does not fix bugs in applications published by external parties.