geom_area_fade          Area Plots with Fading Linear Gradient
geom_catenary           Catenary Curves and Arches
geom_chaikin            Apply Chaikin's corner cutting algorithm to
                        smooth a path
geom_fourier            Fourier Series Smoothing
geom_lexis              Lexis diagrams
geom_point_glow         Points that Glow
geom_pointless          Emphasize some observations with points
