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/

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/

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
- http://www.bootstrap.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

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

Udanax
- Enfiladic Hypertext. Offers open-source license, philosophy behind the systems, an FAQ and an e-mail discussion list.
- http://www.udanax.com/