Qt is a C++ toolkit for application development. It lets application
developers target all major operating systems with a single application
Qt provides a platform-independent API to all central platform functionality:
GUI, database access, networking, file handling, etc. The Qt library
encapsulates the different APIs of different operating systems, providing
the application programmer with a single, common API for all operating systems.
The native C APIs are encapsulated in a set of well-designed, fully
object-oriented C++ classes.