VDK is an easy to use C++ wrapper of Gtk+ GUI library for X. VDK is implemented thinking to moderns RAD tools. It supports properties and an automatic signal/event dispatching feature with a hierarchy visiting pattern. Moreover makes using Gtk+ widgets an easy job to do. The development of a VDK based RAD tool like Borland C++ Builder is in progress.
Visual Oberon is an object-oriented library for writing portable GUI programs in X or Win32. It contains an extensive set of widgets with configurable look-and-feel. Visual Oberon implements the Model-View concept: several visible widgets can reflect a single internal model, and are automatically updated when the state of the model changes.
DirectFB is a thin library that provides developers with hardware graphics acceleration, input device handling and abstraction, an integrated windowing system with support for translucent windows and multiple display layers on top of the Linux framebuffer device. It is a complete hardware abstraction layer with software fallbacks for every graphics operation that is not supported by the underlying hardware.
PHP/Toolbox is designed to make the process of creating database-powered Websites easier. It utilizes the iterative, or step-by-step development paradigm. It therefore enables you to create fully-functional Web interfaces for an arbitrary set of DB tables within minutes. Any changes you make in these tables after the test driving will be handled automatically. You can then adjust this automatic interface in an iterative manner to suit your specific needs.
ViewKlass is a C++ framework for developing applications that use the LessTif or OSF/Motif(tm) user interface toolkits. In particular it provides classes that support the creation of reusable components. It also provides classes that encapsulate some of the more difficult and tedious aspects of Motif development. These include classes to handle the creation of windows, dialogs, and menus. ViewKlass is an open source implementation of SGI's ViewKit(tm), and should eventually become source code compatible with a large subset of of that API.
CLIP is a Clipper/XBase compatible compiler with initial support other xBase dialects. It features support for international languages and character sets. It also features OOP, a multiplatform GUI based on GTK/GTKextra, all SIX/Comix features (including hypertext indexing), SQL and ODBC drivers, a C-API for third-party developers, a few wrappers for popular libraries (such as BZIP, GZIP, GD, Crypto, and Fcgi), a multitasking client and application server based on TCP/IP sockets, object data base utilities, and a functions library.
PicoGUI aims to be a complete GUI environment for handheld computers and other embedded systems. It uses a client/server model, like the X window system, but while an X server is given raw drawing commands, the PicoGUI server integrates a widget set, making PicoGUI clients small and efficient. PicoGUI also has the goal of allowing client/server connections over a variety of mechanisms. It is most commonly used with Linux, but is designed to be portable to any OS. PicoGUI has a variety of video and input drivers which allow it to interface with the Linux framebuffer device, SDL, the X window system, and several other devices.