The links below were kindly sent to us by Samy Alex ZAIMI More contributions are welcome!
http://cm.bell-labs.com/who/hobby/MetaPost.html
http://www.loria.fr/~roegel/metapost.html
from Denis Roegel
(in french). Includes animated examples taken from his 3D package.
http://www.tug.org/applications/pdftex/scherer-src.pdf
from Andreas Scherer. Curves.
http://tug.ctan.org/tex-archive//graphics/metapost/contrib/*
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Updated: November 2001