GRAPHER: The FREE graphing program below runs in Windows (but not Mac)
It can graph IMPLICIT equations, so can graph conic sections without having to solve for y and graph two functions to get the complete graph.
WinPlot Graphing Software (freeware) for the PC
http://math.exeter.edu/rparris/winplot.
Updated Sunday, April 15, 2012 at 9:15:52 PM by Roberta Bloom - bloomroberta@fhda.edu