Outliner takes on a different approach to outlining objects. Rather than using shaders, it produces an outline specifically made for that one object based on its mesh. This allows to preserve the original shading of the model and also assign a texture to the outline. The scripting is fairly difficult, but the final interface of the tool is very simple.
The resulting outline looks very much like an outline made by a toon shader. The thickness and appearance of it can be changed and it is also possible to apply shaders to it, whether to make it glowing or transparent (shaders are not included in the tool).
The link to the asset store: Unity Asset Store - The Best Assets for Game Making
The primary purpose of this thread is to ask for feedback - what could be improved? What is missed? Also, if you have bought this tool and you are satisfied with it, please leave a review in the asset store. If you have any questions or suggestions and would like to contact me directly, please feel free to do so.
Update 1: Outliner has been updated to work on Unity 5. Updated version will soon be available on the Asset Store.
Update 2: The price has been reduced by 10%.