Free 3D sketching program for the conceptual phases of design.
CINEMA 4D offers you all you need to create high-end 3D pictures and animations - right out of the box.
Axure RP gives you the wireframing, prototyping and specification tools
Turn your digital photographs into pencil sketches or watercolor paintings.
It is a drag and drop app that aids in capturing hex, RGB and HSL color values.