Abstract: Systems and methods for executing a second application within a primary application window are provided, thereby improving the usability of graphical user interfaces (GUI). An exemplary method comprises executing a first application on the primary application window. The primary application window displays a plurality of GUI elements associated with the first application. The first application is configured to execute a second application upon processing an event invoked on the primary application window. Thereafter, the first application and the primary application window are suspended and a secondary application window is displayed within the primary application window. The second application window displays a plurality of GUI elements associated with the secondary application. The first application and primary application window automatically resume after closing the secondary application window.

Abstract: A method for notifying a user about new property listings includes: determining, when the user connects to a real estate property portal of a notification system that also includes a real estate property listing database, whether the user previously connected to the portal; retrieving activity of the user from previous connections of the user to the portal if the user previously connected to the portal; tracking and saving the activity of the user while the user is connected to the portal; and analyzing for patterns in the tracked and/or retrieved activity of the user; wherein the notification system is programmed to perform such steps. The portal is programmed to retrieve listings from the real estate property listing database.