====== PSTricks (obsolete) ======

  * [[http://tug.org/PSTricks/main.cgi|www.tug.org: The PSTricks Web Site]] - Tips & tricks of creating Postscript graphics for LaTeX.
  * [[http://www.ece.uwaterloo.ca/~aplevich/Circuit_macros/|Circuit_macros, Version 6.5]] - Tools for drawing electric circuits and other line diagrams.