References
The Art of Craig Mullins - Definitely one of the best references of digital painter in the world!
Steven Stahlberg - A great painter and 3D modeler (damn, he knows female anatomy this guy!)
Michel Roger - A french digital artist and his site contains amazing tutorials (mainly 3D)!
Second reality - Another creative digital artist
Anry - Another great, great, great painter !

Some friends of mine
Patrick Jones - 3D modeling, drawings
Mike Bintz - 3D modeling, broadcasting
Claire Hubin - Webdesigner
Stéphanie Walter - 3D modeling, webdesign
Patricia Vanespen - Photography