Ultimate++ is an attempt to develop an optimal desktop development platform for Win32 and Linux. By utilizing of new ideas in C++ development, Ultimate++ achieves significant reduction of code complexity for most applications when compared to other development platforms. It consits of a set of libraries and TheIDE, a development environment. TheIDE can also be used to develop non-Ultimate++ applications. A big advantage of TheIDE is BLITZ-build technology, which speeds up large C++ rebuilds by up to 4 times.
VDKBuilder isa GPL'ed RAD tool based on VDK library. It provides the programmer with an integrated environment for designing GUI interfaces, editing sources, compiling, linking and debugging.
Virtual Terrain Project
The VTP software includes end-user GUI applications and C++ libraries for creating interactive 3D visualizations of the real world. It reads nearly all forms of geospatial data.
(commercial) Visual Prolog is a complete programming environment based on the Prolog programming language. It contains everything needed for building large-scale commercial applications: graphical development environment, compiler, linker and debugger. Visual Prolog is the successor of Turbo Prolog and PDC Prolog.
Wing IDE is a complete integrated development environment for the Python programming language. It is a powerful, customizable IDE for programmers who would like the convenience of a graphical development tool without sacrificing control of their build and development environment.
(commercial) wxDesigner is a visual development tool for the free cross-platform GUI library wxWidgets - supporting C++, Python, Perl, C# and XML.
XBasic is an integrated software development environment including an advanced compiler, edit/run/debug environment, and interactive GUI-Designer.
XBasic is a comprehensive program development environment that integrates a powerful editor, compiler, debugger, function libraries and GuiDesigner into a seamless working environment that encompasses the whole process of creating fast, efficient, reliable, portable 32-bit programs.
XmCode is a light, simple and fast programming environment, based on GNU development tools. It is a free software based on the Motif toolkit.
XotclIDE is an Integrated Development Environment for Xotcl. Xotcl is an object oriented extension for tcl.
xRope is a GUI IDE for Python development. It uses Python, Tkinter, and Pmw. xRope's editor is 'rope'; xRope is to rope what xEmacs is to Emacs.