http://calca.io/ http://calca.io/ doesn't have graphing, but it's pretty wonderful otherwise. (But FWIW, I'd rather see general-purpose programming become easi

http://calca.io/ http://calca.io/ doesn't have graphing, but it's pretty wonderful otherwise. (But FWIW, I'd rather see general-purpose programming become easier to use than calculators become more complex.)