A long time ago, Unity did not include a system for allowing mesh morphs in Unity. So I built one.
The old Unity project can be found in the store still:
With it being added, it's no longer useful for anything except an example of low level mesh manipulation inside of Unity.
It included custom tools for exporting morphs as image files, animation timing files, and UV maps from Blender3d. Unity would then import these files to playback the animation morphs.