I've made a Digital Clock in C++ using Qt Framework. It'll show the current time of your time zone.
I've made a TO DO LIST using C++ in Qt, which will hold four records of the work the user have to do. The logics are written in C++, but the UI is made using Qt.
I've made a Password Generator using C++ in Qt, which will generate a password between length 5-50 characters. The logics are written in C++, but the UI is made using Qt.