Here is a list for Visio shapes expansion. Network Equipment Shapes for Microsoft Visio – download More than 2000 shapes of  3Com, APC, Cisco, Dell, Hewlett-Packard, IBM, Nortel, Panduit, and Sun Microsystems network equipment. Geographic Map Shapes for Microsoft Visio – download Visio Educational Shapes – download Chemistry: Molecules, Organic Compounds. Mathematics: 3-D Geometry, Analytical Geometry, Angles, Circles & Ellipses, Common Functions, Exponential, Read more