Create Logarithmic Charts with EaseCanvasJS allows you to convert any axis into logarithmic scale just by setting a Boolean flag. Zooming / Panning is also supported on all the axis.
Highly Customizable APIChart API is simple and also highly customizable. For example you can have multiple axis for visualizing data that fall under different range of values and represent the related axis using color. You can also combine linear and logarithmic scales.