This tutorial teaches you how you can load Active settings modules into your app, and create your own modules.
Active Settings is an app, much like Plasma Desktop's kcmshell that shows and loads configuration modules. These configuration modules are plugins providing a QML package and an optional C++-plugin which exports custom-written configuration objects as QObject to the declarative environment.
You can query available modules using the --list argument to active-settings:
$ active-settings --list org.kde.active.settings.web Settings for history, caching, etc. org.kde.active.settings.configtest Test Module for the Config Bindings org.kde.active.settings.time Settings for timezone and date display
You can load an individual module by supplying its plugin name as argument to active-settings: active-settings org.kde.active.settings.time will open the active-settings app and load the "Time and Date" module on startup.