by The Zakies
Tutorial 1 (how to create a vector graphics program)
by honey the codewitch
Create ASCII art from common image formats and text
by veen_rp
Smooth a 2D polyline through interpolation (Catmull-Rom) or approximation (Chaikin)
by Voevudko A. E., Ph.D.
Demonstrating a few approaches to generating and plotting fractals in R and offering R scripts realizing it.