This tool allows you to generate 3D arrows.

You can generate the arrows by simply drawing curves on your scenes.

..and edit the in real time

Turn the arrows to curves.

You can also twist and change the radius of the arrows

The arrows shape can be customized and you can output them as curves.

To use that, all you have to do is save the .blend file inside the your Assets Library folder. After that you will be able to drag the Arrows assets on top of a curve to start using it.

You can what this video to learn more about it!