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PGF and TikZ examples gallery| fauskes.net
Common Lisp vs Racket | Hacker News
some good links within.
Learning Racket #1: Introduction
Postscript
Note ·
Mathematical Illustrations an introduction to mathematical illustrations using postscript programming language. This is…
Mathematical Illustrations: A Manual of Geometry and Postscript ( Cambridge Press ) by Bill Casselman
Postscript is very cool. wish I had discovered it when I was trying to draw pictures using BASIC or C-Graphics :)
Firefox canvas examples