Abstract: Interactive application tools, systems and methods are described. A system includes an application tool that enables a user to compose project logic for an application through a user-interface. A memory stores the project logic. The application tool includes one or more user-interface elements that enable a user to identify conditional logic and parameters for events that compose the project logic. In this way, a user can create an application solely through the user-interface without having to write or compile program code.

Abstract: Application development previewer tools, systems and methods are described. A set of models are linked in a model hierarchy representing interactions and effects for objects in one or more scenes in the application being developed. A computer-implemented method for previewing an application being developed includes initializing a loading context, loading a scene model for a scene to be displayed, traversing models linked to the loaded scene model in branches of the model hierarchy, creating runtime objects in a scene based on the traversed models in the stored set of models, and processing the created runtime objects and corresponding media assets to obtain a runtime loading context having event rules and actions for nodes in one or more scenes in the application being developed. A user viewing a display can preview the interactions and effects for objects in the one or more scenes in the application being developed.