Qt Design Studio 2.0 Beta Released For Quickly + Easily Designing UIs
Qt Design Studio 2.0 is focused on improving the user experience for developing these Qt-based UIs. The 2.0 Beta release has improvements around thumbnail generation, rotating items, navigator improvements, and other enhancements.
Here is a video on their current Qt Design Studio release if not familiar with this program's capabilities for UI designers:
Those into UI design can learn more about the Qt Design Studio 2.0 beta via Qt.io. A free community version of Qt Design Studio is available while The Qt Company also has a commercial offering and integration support with Adobe Photoshop and other popular design software.