Quail Springs Permaculture Learning Oasis- Teaching classes on Natural Building, Permaculture and Primitive Skills.  
Cob Workshops- A compilation of cob workshops all over the US.
Hand Print Press- (Kiko Denzer) A small publishing company focusing on combining fire, art and earth.  
New Frameworks Natural Building- A Design Build company in the north east.  
Canelo Project- Artisan natural builders in southers Arizona.
Chris Magwood- Master natural builder in Canada
Cob Cottage Company- Teaching cob building workshops in Oregon.  
Tactile Interiors- Tracy Thieriot has been doing incredilbly beautiful natural plasters and finishes for many years.  
Ochres and Oxides- The best pigments for natural plasters.