FOX GUI Toolkit An open source cross-platform C++ based Toolkit for GUI development.
GUIS Open source widget server. (Python, Ruby, GTK2) [OS Independent]
InputGUIDO A GUI being developed for older DOS systems that are incapable of running Windows.
Java Gui Builder An engine that reads XML files describing graphical user interfaces layout.
KronoJunior Open source GUI for less powerful or old computers.
ObjectCentral - V A free, multiple platform C++ graphical user interface framework.
Prima Toolkit for multi-platform GUI development. (Perl) [OS Independent]
The Official FVWM Homepage The standard window manager for linux, stable but not as pretty as Window Maker or Enlightenment.
The Visual Component Framework C++ framework created to provide platform GUI framework, features such as Java and Java's Swing, and Borland's Visual Component Library.
