Qt
Qt is the fastest and smartest way to produce industry-leading software that users love.
- Freemium • Open Source
- Mac
- Windows
- Linux
- BSD
What is Qt?
Qt is a cross-platform application framework that is widely used for developing application software that can be run on various software and hardware platforms with little or no change in the underlying codebase, while having the power and speed of native applications.
Qt is used for device creation, UI and application development supporting deployment to over a dozen leading platforms – desktop, mobile and embedded. Qt comprises the Qt framework with modular cross-platform C++ class Qt libraries and Qt development tools including an integrated development environment, 
Qt Creator IDE, and productivity tools.
Qt Screenshots
Qt Features
Qt information
Supported Languages
- English
Comments and Reviews
Tags
- framework
- sdk
- development
- programming
The perfect for a C++ dev.
start at $80 license cost per device (for a 100 devices batch) half of the final product price only for the GUI??? totally overpriced, not suitable for indie/makers commercial produtcs, only for big companies, fun or OSS projects
Subscription is for comercial licensing purposes...
so is QT free? where can I download it?
Reply written
You can download it from here: https://www.qt.io/download
Reply written
qt normally used for UI on some scientific machinery , embedded devices, automotive, medical, etc
basically anything that uses complex software in a hardware-User-interface