One or more application providers supply primary data and user interface rendering information to a computing system. The computing system comprises modules that mange the received data and generate a user interface using the received rendering information. Data may be managed by resolving conflicts in the primary data as between the one or more application providers. Data may also be managed through the creation of derived data based at least in part on the received primary data. A user interface may be generated that has several applications displayed in an application cluster. The applications may be generated based on the rendering information. A user may interact with the user interface and may be able to edit the primary data. If the primary data is modified, the computing system communicates the modifications to the one or more application providers that supplied the original, primary data.