IxD Encyclopedia
The people behind Interaction-Design.org introduced a new type of top-quality and free encyclopedia dealing with Interactive Design, Usability, and User Experience.

It has taken the opposite approach of Wikipedia and crowd-sourcing: all entries are written by leading figures who either invented or contributed significantly to each topic.

The new encyclopedia also features video interviews shot at different universities around the world.

The materials available for free, because the Interaction-Design.org people believe in the value of knowledge democratisation, where all can can get free access to world-class educational materials.