Official Window Maker Website NeXT Step alike window manager for the X Window system on GNU/Linux. http://windowmaker.org

The Official FVWM Homepage The standard window manager for linux, stable but not as pretty as Window Maker or Enlightenment. http://fvwm.org/

Welcome to 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. http://vcf.sourceforge.net

InputGUIDO A GUI being developed for older DOS systems that are incapable of running Windows. http://www.trhonline.com/input/

Java Gui Builder An engine that reads XML files describing graphical user interfaces layout. http://jgb.sourceforge.net/

ObjectCentral - V A free, multiple platform C++ graphical user interface framework. http://www.objectcentral.com/

FOX GUI Toolkit An open source cross-platform C++ based Toolkit for GUI development. http://www.fox-toolkit.org/

KronoJunior Open source GUI for less powerful or old computers. http://kronojunior.sourceforge.net/

Prima Toolkit for multi-platform GUI development. (Perl) [OS Independent] http://www.prima.eu.org/

GUIS Open source widget server. (Python, Ruby, GTK2) [OS Independent] http://starynkevitch.net/Basile/guisdoc.html

Owl Intranet Engine A multi-user knowledgebase system for publishing files/documents onto the web. (PHP) [OS Independent] http://owl.sourceforge.net