We are very pleased that you and one million others are using Qt for creating amazing applications and devices for an overwhelming number of different purposes. We are proud when Qt enables developers to create their applications.
In order to make Qt more visible we are now introducing new “Built with Qt” logo.
We have updated the Qt trademark policy to allow the use of the new "Built with Qt" logo in conjunction with the applications and devices using Qt. The logo can be used, for example, in the "about box" or "splash screen" of a Qt based application. The Qt brand guidelines explain how to use the logo correctly and provide the logo in a couple of different formats.
In addition to introducing the new "Built with Qt" logo, we have updated the Qt trademark policy to allow fair use of the Qt logo in many situations, without a separate trademark license. For example, it is allowed to use the Qt logo in electronic marketing material of a product created with Qt as well as in articles about the Qt software or the Qt Project.
Please note that not every use of the Qt trademark is allowed under the fair use. For example, we do not allow the use of Qt trademarks directly in your product names or domain names. Similarly, use of the Qt logo on a book cover still requires a license. The trademark policy provides instructions on how to request permissions to use the Qt logo or other Qt trademarks in different ways than what is allowed in our fair use policy.
The Qt Showroom is continuously seeking more great showcases of Qt usage. If you have created something awesome with Qt, let’s do a showcase together in our Qt Showroom.
You can find the new "Built with Qt" logo and other Qt logos and materials at http://brand.qt.io.