Qt is a cross-platform application and UI framework. Using Qt, you can write web-enabled applications once and deploy them across desktop, mobile and embedded operating systems without rewriting the source code.
Features:
Intuitive C++ class library
Portability across desktop and embedded operating systems
Integrated development tools
with cross-platform IDE
High runtime performance and small footprint on embedded
Platform: Cross Platform; License: GNU LGPL 2.1、GNU GPL3, with Qt special exception、Commercial Developer License
Reference: https://qt.nokia.com/