• Probably the best source about GEF seems to be simply the online help. The demo programs are nice. You should understand the meaning of the LightweightSystem early, so that this class does not irritate you.
• Here are some of the interesting links where we can find examples (works with eclipse 2.x)

http://eclipsewiki.swiki.net/50#hellogef6

http://eclipsewiki.swiki.net/50

• Here you can find a lot of resources

http://eclipse-wiki.info/_Page?page=GEF&page-version=3

• Here you can find IBM Red Book entitled

“Eclipse Development using the Graphical Editing Framework and the Eclipse Modeling Framework.”

http://publib-b.boulder.ibm.com/Redbooks.nsf/RedpieceAbstracts/sg246302.html?Open

• Getting Started with GEF Tutorial

http://www-106.ibm.com/developerworks/opensource/library/os-gef/

• Example for displaying a UML Diagram using GEF

http://eclipse.org/articles/Article-GEF-Draw2d/GEF-Draw2d.html

• GEF Snippets

http://eclipse-wiki.info/GefSnipets

• Using Native DRAG and Drop using GEF

http://eclipse.org/articles/Article-GEF-dnd/GEF-dnd.html

• Excelsior JET Evaluation Tool for Creating Applications with SWT and JFace.

http://www.excelsior-usa.com/jetswt.html

• GEF Repository

http://dev.eclipse.org/viewcvs/index.cgi/gef-home/?cvsroot=Tools_Project

• gef_tutorial.pdf