*pic [#ce82732b]

picとは,A Graphics Language for Typesetting

・http://www.cs.bell-labs.com/10thEdMan/pic.pdf  by Brian W. Kernighan

・http://www.math.uiuc.edu/~west/gpic.html  by  Douglas B. West

**dpic [#n4789561]

・http://www.ece.uwaterloo.ca/~aplevich/dpic

**gpic [#re376f4f]

・http://www.math.uiuc.edu/~west/gpic.html  by  Douglas B. West


*xy-pic [#b9215e15]
・http://tug.org/applications/Xy-pic/

・http://www.math.columbia.edu/~lauda/xy/

・http://www.ms.u-tokyo.ac.jp/~abenori/tex/index.html#xy-pic

・http://akagi.ms.u-tokyo.ac.jp/ftp-j.html (日本語での解説,より詳しい解説)