QFace does provide some real world reference generators which are hosted as separated projects. Their purpose is merely to showcase how to write a code generator using QFace. They are working and complete examples of general purpose generators.
The QtCPP generator generates a Qt C++ plugin with a QML API ready to be used in your project.
Hosted at: https://github.com/Pelagicore/qface-qtcpp
The QtQml generator generates a QML only API which ready to be used.
Hosted at: https://github.com/Pelagicore/qface-qtqml
The RO (RemoteObjects) generator generates a client and server project using the Qt5 QtRemoteObejcts library
Hosted at: https://github.com/Pelagicore/qface-qtro
From the QML user interface perspective the QtCPP and QtQML generators both provide the same API and are interchangeable.