Download SugiyamaToonShader Free Unity. 

High-end toon shader with highly configurable contour color and line width.
3 modes which can be made full use of from beginners to experienced.

Tutorial Movie Link
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[auto]
You can make contours easily by automation.
– Contour colors are choosen by picking darken texture color.
– Contour line width is fixed automatically by calculating distance from the model to the camera.
– You can add a specular color for an arbitrary light.
* Change the ink size when you change the size of the model.

[color]
You can specify contour color for objects.
– Besides auto mode, you can specify contour colors of objects.