Systems and techniques for producing graphical user interfaces on handheld mobile devices include generating a markup language code defining a graphical user interface component for display on the handheld mobile device and rendering the generated markup language code to produce the graphical user interface component. In some cases, the graphical user interface component includes at least one adaptable attribute based on a selection made by a user. In other cases, a graphical user interface component is generated using static markup language code or a combination of static and dynamically generated markup language code. Graphical user interface components defined by markup language codes can be displayed in an overall graphical user interface along with components that are native to the device and/or that are defined by an application development platform.