A computer-implemented system is provided that facilitates implementation of a voice over IP (VOIP) application. The system includes a host system and a user interface (UI) host process residing on the host system. The system also includes an agent host process residing on the host system which is being configured to process a VOIP call received by one or more VOIP applications executable on the host system. The agent host process running as a foreground or background process for the duration of the VOIP call to (i) communicate with a VOIP server associated with the VOIP application, (ii) capture content from at least one input device associated with the host system and (iii) render content on an output device associated with the host system when an instance of the UI host process operates in the foreground.