Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsA Library of Functions with Transformationshttp://demonstrations.wolfram.com/ALibraryOfFunctionsWithTransformations/]]>http://demonstrations.wolfram.com/ALibraryOfFunctionsWithTransformations/