graphics package

Anyone have a recommendation for a software package that makes it easy to draw the equivalent of flow chart? with boxes, triangles, circles as junctions?? .oooO Jim Stasheff jds@math.unc.edu (UNC) since retiring from UNC hanging out at U Penn jds@math.upenn.edu \ ( 146 Woodland Dr FAX:(215)-573-4063 \*) Lansdale PA 19446-1437 http://www.math.unc.edu/Faculty/jds