AltioLive Studio provides a development environment to rapidly build front ends to complex Web based applications, with rich client interactivity beyond the capabilities of the best AJAX front ends. Included are a Visual GUI builder, a backend integration tool, and other development tools, which allow developers to build the interface for their applications quickly, remotely, and without touching an XML or Java editor, so that they can get on with developing the business logic on the backend.
Flying Saucer is a pure Java XML/CSS 2 renderer whose aim is to provide spec-compliant CSS 2.1 rendering for any well-formed XML document. The current codebase can render to Java2D-based canvases (Swing panels), PDF via the iText library, and images. The library currently covers the greater part of the CSS 2.1 specification.
libx1f4i0 is a C library that provides some (text) user interface functionality. It includes a sophisticated expression evaluator, a proto application extension programming language interpreter, about one thousand number parsing and formatting primitives, a fancy printf-like text formatter for applications, and miscellaneous trivial conveniences.
reacTIVision is a computer vision framework for the fast and robust tracking of fiducial markers attached to physical objects, as well as for multi-touch finger tracking. It was mainly designed as a toolkit for the rapid development of table-based tangible user interfaces and interactive multi-touch surfaces such as the reacTable. Client application examples are available for various programming environments such as C++, Java, C#, Processing, PureData, Max/MSP, and Quartz Composer.
General Graphics User Interface is an effort to produce a common graphical user interface for any command line program. It uses a wizard-like input front end to collect the information needed. It then calls the desired program automatically with all the necessary options. The user is able to point and click on various options and select them in a convenient way. In order to create a new user interface, a user doesn't need to know a programming language, since there is a graphical editor for new GGUI "scripts".