- Linux/Windows

  Requirements:
  	
	windows:	python (enthought)	code.enthought.com/enthon
	(all python dependencies, only need graphviz)

	python				www.python.org
	wxPython			www.wxpython.org
	(c)elementtree 	elementtree
	effbot.org/zone/element-index.htm (slower but more widely available)
			celementtree 	effbot.org/zone/celementtree.htm (preferred)
	graphviz			www.graphviz.org

  Optional:

  	Python Imaging Library		www.pythonware.com/products/pil/

	(It might be possible to include PIL in the sources)