MW is a low footprint embedded UI framework core intended for use on very limited systems. It embeds the JPEG, Freetype, and Cairo libraries, so it only depends on X. It should be fairly portable, as the only thing you need is to create a window on every platform and manage the events.
CroosUI RAD Desktop is a rapid application development tool that makes it possible for developers to quickly develop and package exactly same code and UI into Web apps, native desktop apps for Windows, Mac OS X, Linux, and UNIX on 32-bit and 64-bit architectures, and mobile apps for iPhone, iPad, Windows Phone, webOS, BlackBerry, and Android devices.
CrossUI RAD Tools enables developers to rapidly develop and package the same code and UI into Web Apps, native desktop apps for Windows, OS X, Linux, and Unix on 32-bit and 64-bit architectures, and mobile apps for iPhone, iPad, Windows Phone, webOS, BlackBerry, and Android devices.