Qt
Qt is a cross-platform application development framework used for creating graphical user interfaces (GUIs) and applications that run on various software and hardware platforms. It provides a comprehensive set of libraries and tools for building desktop, embedded, and mobile applications with native performance and look-and-feel. The framework is written in C++ but supports bindings for other languages like Python and JavaScript.
Developers should learn Qt when they need to build cross-platform applications with a single codebase, especially for desktop and embedded systems where performance and native integration are critical. It is ideal for industries like automotive, medical devices, and industrial automation due to its robust widget toolkit, multimedia support, and networking capabilities. Qt is also valuable for creating applications that require advanced 2D/3D graphics, such as in gaming or simulation tools.