Ring:
ADOPT
Qt is a cross-platform, C++ application framework primarily used for writing cross-platform graphical user interfaces, also supporting embedded devices.
v1 -
Qt 6 is the latest major version and it is recommended that this be adopted if possible but note that Qt 6 requires a relatively modern Linux distribution, for example Red Hat >= 8.4, so if support for an older Linux OS is required then Qt 5 is still available or consider running the application in a container.
Qt is written in C++ but there are also Python bindings, e.g. PyQt, available for writing applications in Python that are backed by the Qt framework.