Another D3-based, open source library is Contour: http://forio.com/contour/ http://forio.com/contour/ Easy to implement basic charts like line, bar, pie, scatt

Another D3-based, open source library is Contour: http://forio.com/contour/ http://forio.com/contour/ Easy to implement basic charts like line, bar, pie, scatter, etc. and extensible with D3.