Luxor is an open-source XML User Interface Language (XUL) toolkit in Java that lets you build UIs using XML and also includes an ultra light-weight, multi-threaded Web server, a portal engine, and a template engine. It is also Web Start-ready, as everything fits in a jar and requires no loose files.
Motif is the industry standard graphical user interface (GUI) available on more than 200 hardware and software platforms. It is the de facto graphical user interface on UNIX systems in heterogeneous networked computing environments. Motif is fully specified by the IEEE 1295 standard, providing application developers, system vendors, and end users with a stable, mature and reliable environment for application presentation on a wide range of platforms. Motif is also the base graphical user interface for the Common Desktop Environment (CDE) and a number of other desktops.
XView (X Window-System-based Visual/Integrated Environment for Workstations) is a user-interface toolkit to support interactive, graphics-based applications running under the X Window System. XView provides a set of pre-built, user-interface objects such as canvases, scrollbars, menus, and control panels. The appearance and functionality of these objects follow the OPEN LOOK Graphical User Interface (GUI) specification. XView features an object-oriented style Application Programmer's Interface (API) that is straightforward and easy to learn.
OIO is a Web-based metadata/data management front-end which is built using Zope and works with Postgresql. No programming is required to build and manage Web-forms or to perform data mining/analysis on the collected data. It is in production at the Harbor/UCLA Medical Center for clinical outcomes management and research data. Forms created with OIO and hosted on any OIO server can be downloaded as XML files. Once downloaded from the "Forms library" and imported into an OIO server, the necessary database tables are automatically recreated and the imported forms become immediately available to the users of that OIO server.