The K Desktop Environment:	http://www.kde.org
Troll Tech (QT Libs):	http://www.troll.no
The GNOME project:	http://www.gnome.org
The Gimp Toolkit:	http://www.gtk.org/
Red Hat Labs (RHAD):	http://www.labs.redhat.com/
XFCE (A CDE lookalike)	http://www.linux-kheops.com/pub/xfce/
XForms Library (for XFCE)	http://bragg.phys.uwm.edu/~zhao/ftp/ftp.html
TkDesk	http://people.mainz.netsurf.de/~bolik/tkdesk
Enlightenment WM:	http://www.enlightenment.org
WindowMaker WM:	http://www.windowmaker.org

Presentation by Tom Wheeler @ SLUUG Linux SIG -- 9/19/1998