Over the year's a lot of products have claimed to be multi-platform and none of them come close to Qt. Write it once, compile for the target using the platform compiler, the job is done.

Provides an amazing environment to develop in C++ for cross platform.

Qt is an exceptional framework that offers developers a lot out of the box. One of the best aspects of Qt is its versatility and cross-platform capabilities. The most helpful feature of Qt is its extensive collection of ready-to-use widgets and tools, which significantly accelerates the development process. The framework comes with QML which speeds up GUI development significantly. The framework also provides a rich set of functionalities, including GUI, networking, database integration, and multimedia support, which simplifies the implementation of complex applications. Overall, the upsides of using Qt include its excellent documentation, a supportive community, and a vast ecosystem of third-party libraries and plugins, making it a reliable choice for building high-quality applications.