Hypertext

Abora Hypermedia Project
Hypertext system supporting fine-grained links, transclusions and user link filtering. Features screen shots, technical reports and sub-projects.
http://www.abora.org

Assoziations-Blaster
Network that connects text through automatic, non-linear real-time linking. Features an FAQ, personal configuration and a discussion forum.
http://www.a-blast.org/

The Big Picture
Visual Browsing in Web and non-Web Databases. Directory of projects, research, products, and services.
http://www.public.iastate.edu/~CYBERSTACKS/BigPic.htm

Bill Kennelly's History of Hypertext
This site is about the people, systems and key events in the evolution of hypertext.
http://www.ultradevguru.com/ver2_hypertext/

Bootstrap Institute
The Institute's Mission is to cultivate a knowledge environment which includes a shared dynamic knowledge repository; to foster development of an open platform information system infrastructure, based on an Open Hyperdocument Systems (OHS) framework; and to share the A-B-C's of Bootstrapping and support co-evolution of human organizations and their tools
http://www.bootstrap.org/