Abstract: An interactive system is configured to be extensible, allowing use of plugins that detect content entry input of each of the one or more users on a user-generated content of a canvas. In response to detecting each content entry input, (i) the interactive system (i) automatically triggers execution of a plugin, the plugin being implemented as a program that executes separately from the interactive system; and (ii) renders at least a first output generated by execution of the plugin with the user-created content.

Abstract: A computing system operates to associate a layout logic with a plurality of object that are rendered on a canvas of a user device, where the plurality of objects include a parent object and multiple child objects contained within the parent object. The multiple child objects can be arranged to have a first collective span in a first axial direction and a second collective span in a second axial direction. In response to a first input, the computer system automatically implements the layout logic by (i) changing a dimension of the parent object in each of the first axial direction and second axial direction, and (ii) rearranging the multiple child objects within the parent object to change the first collective span and the second collective span.

Abstract: A computing system receives position data from each of a plurality of user computing devices, the position data indicating a cursor position on a collaborative user interface for each collaborator during a collaborative session. The system determines, based on the position data, whether the cursor position of a respective collaborator is within a bounding area of a widget presented on the collaborative user interface. When the cursor position of the respective collaborator is within the bounding area of the widget, the system transmits feedback response data to each of the plurality of user computing devices to cause a corresponding feedback response for the widget to be presented on the collaborative user interface displayed on each of the plurality of user computing devices.

Abstract: A plugin management system is provided as part of an interactive system, to enable users to search for and execute desired plugins. The plugin management system provides a search user interface to receive inputs from the user, as well as parametric values that are used by the selected plugin. Based on the user interaction with the search user interface, the plugin management system executes identified plugins, using parametric values specified by the user.

Abstract: An integrated application platform enables users to select and implement widgets, in order to insert widget objects with rendered content. The widget objects are persistent content elements that are dynamically responsive to user input. Further, the widget objects are associated with functionality that extends or supplements the functionality provided by the integrated application platform.

Abstract: A sound synthesizer 101 that plays a pre-determined sequence of sound notes one by one when the user taps on a touch sensitive surface 104 of the sound synthesizer 101. Different music is produced by varying the intervals between the sound notes, even from the same sequence of sound notes. The sound notes are selected according to a pre-determined scale, such as the pentatonic scale, for ease of matching to other music scales, and to reduce the disonnance between sound notes in scales such as that seen in the major scale.