Look up words in the Visuwords online graphical dictionary and thesaurus to find their meanings and associations with other words and concepts. Produce diagrams reminiscent of a neural net. Learn how words associate.
LaTeXDraw is a free PSTricks code generator or PSTricks editor for LateX distributed under the GNU GPL. LaTeXDraw is developed in java, so it's independent of the OS. It's available in English, in Spanish and in French.
D. Leithinger, and M. Haller. Horizontal Interactive Human-Computer Systems, page 121--128. (October 2007)Journal Abbreviation: Horizontal Interactive Human-Computer Systems, 2007. TABLETOP '07. Second Annual IEEE International Workshop on.