Abstract: A messaging system is provided whereby a message indicative of an invitation to collaboratively execute an application can be sent from one of the computing object to an intermediary system whereby the message is multicast to the other ones of the plurality of computing objects. The invitation message can be accepted by the other computing objects to cause the first object to launch the corresponding application. The other computing objects also launch versions of the application and exchange addressing information with the first application so that a multiparty application execution can be established.

Abstract: Methods, systems, and computer program products for tracking real-time communication data within a single contact tracking application for diverse communication providers and applications. A global data store is synchronized with real-time communication data, such as presence, status, unread messages, and unread notifications, from each application/provider. Real-time communication data for contacts dynamically determined to be recent contacts is retrieved from the data store, based on properties such as a most recent communication time, a communication count, and the like. Real-time communication data corresponding to contacts identified as pinned contacts for which display of real-time communication data is preferred, also may be retrieved. A user interface is generated for displaying the one or more recent and/or pinned contacts, which may vary in size based on the number of contacts identified as pinned contacts, from which a contact may be selected for real-time conversation or e-mail.