Critical Thinking on the Web
An extensive directory of quality online resources.

The Reason Project
Research project in critical thinking skills acquisition at the University of Melbourne.

Email list for people interested in the theory and practice of argument mapping

Email discussion list for people interested in following the writings of Paul Monk

Website for collaborative construction of argumentation "maps" of complex debates, developed by Austhink associate Peter Baldwin.
Materials and links related to legal evidence, with an emphasis on argument mapping.

Bootstrap Institute
Continuing the pioneering work of Douglas Engelbart in the technological augmentation of human intelligence.

CogNexus Institute
U.S. group specialising in Dialog Mapping, which is closely related to argument mapping.