Abstract: Systems and methods for categorizing objects in accordance with one or more user categorization actions are disclosed. In some embodiments, the occurrence of one or more categorization actions is detected for a first object in a list of objects in a messaging application. Categorization actions include starring the object, dragging and dropping an object from one cluster to another, adding a new cluster label, and providing filtering rules for an object. Then a set of properties for the first object is updated in accordance with the one or more categorization actions. The updated set of properties for the first object is compared to one or more categorization rules. For instance, an exemplary categorization rule is that a starred message is to be displayed in a primary cluster. Then information for displaying the first object in the list of objects in accordance with the one or more categorization rules is prepared.

Abstract: The subject matter of this specification can be embodied in, among other things, a system that includes a container document, a plurality of portable program modules residing in the container document, and a repeater residing in the container document. In addition, at least one of the plurality of portable program modules may be configured to define a communication channel and to identify itself to the repeater as a publisher to the communication channel. Furthermore, at least one of the plurality of portable program modules may be configured to identify itself as a subscriber to the communications channel.