"ScreenLib is a small library for native Windows Mobile developers. It takes away a lot of the pain of designing user interfaces for multiple screen sizes, orientations, form factors etc. It lets you create a user interface once and have it automatically adapt to whatever the device’s screen size is at runtime. By doing this, it offers basic docking & anchoring support for native development and can do a lot of UI plumbing work with just 1 or 2 lines of code."

MelSam’s Blog : Introducing ScreenLib - a free UI development library for Windows Mobile!