A conversation interface in a messaging application is displayed, the conversation interface being presented to participants in a conversation that is being conducted on the messaging application. The conversation interface is constructed by determining statuses of at least two external resources that have been launched, within the context of the messaging application, by one or more of the conversation participants. An external resource notification interface (or “dock”) is displayed in the conversation interface, the external resource notification interface including icons corresponding to the at least two external resources. Upon user selection of the external resource notification interface, a list interface (or “drawer”) including user-selectable cells corresponding to the at least two external resources is displayed.