An attempt to provide an Object-Oriented application development framework and tool set for use on a wide variety of computer platforms. Based on the original OpenStep specification provided by NeXT, Inc.

Patches to provide TrueType font support for X11.

Emulates SGI's GL routines under X11. It compiles fine under AIX 3.2, HP-UX 7.0/8.0/9.0, Linux with XFree, SunOS, ConvexOS and others.

Project that aims to develop a reliable, stable and fast graphics system that works everywhere which will allow any program using GGI to run on any platform requiring at most a recompile.

A freeware portable C++ GUI framework for Windows, X, and OS/2.

Full windowing and rich client framework written in JavaScript enables full featured application solutions to run in just a standard browser with astoundingly rapid development and deployment ease.

A cross-platform C++ based Toolkit for developing GUIs easily and effectively (Unix/X, Win32). [Open source, LGPL]

Toolkit for cross-platform GUI programming on Windows, X-Windows, Linux and Macintosh systems. It works with the C, C++ and Python languages, and the source code can be freely downloaded here.

By ProtoDesign, Inc. Develop and deploy highly interactive scientific and engineering simulation programs without writing one line of graphical user interface (GUI) code.

JX is a full-featured C++ application framework and GUI class library for the X Window System.