ForeUI is a handy UI prototyping tool. It can rapidly create static or interactive, skinnable UI prototypes of your Web site or software. It features various UI themes (Wireframe, Windows, and Mac), interactive simulations that run in Web browsers, customized element creation, slide show and PDF exporting, and a rumple effect to suggest incompletion.
RedQueryBuilder fills the gap between a hand coded "quick search" and a full blown query language. A typical use is in an intranet Web application where experienced users need a quick ad-hoc way to find particular data. This means they don't have to use report frameworks or ask a techie. To use it in your app, you just need to drop in the JS, feed it the metadata for your database, then handle the change events to get the SQL and argument values.
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.
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.
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.