Running content emitters natively on local operating system

Techniques for running content emitters natively on a local operating system, by executing a local executive as a native application on the target operating system. In some embodiments, a content emitter such as a portlet preferably invokes, by its normal inclusion mechanism, a markup emitter directed toward the native user interface environment. The markup streams created by locally-executing portlets are collected by the local executive, but instead of being combined into a browser-based markup stream as in the prior art, one or more windows represented by the markup streams is/are created for rendering with the native operating system. An association is maintained between the created window and the portlet(s) emitting content for that window, and controls can be created and valued for the window using this association. In other embodiments, the content emitters execute remotely and deliver content that is adapted for native rendering.