HyperScope is a faithful reproduction of Douglas Engelbart's NLS/Augment and VAT systems; our goal was to reproduce pieces of these systems into contemporary web browsers, changing as little as possible for this phase. The software therefore requires some training to use. Start with our tutorial.
You can read a HyperScope-version of Doug Engelbart's classic 1962 paper, "Augmenting Human Intellect: A Conceptual Framework." More demo documents are available here.