Align-Between-Two

Adds a simple menu to the Tools side menu (press N key to toggle Tools panel), then select 2 objects to rotate between, then select the 3rd object that you want to rotate.

Should be compatible with Blender 2.8x, 2.9x, and 3.x
If you find any bugs or want to request a feature please feel free to open a Github issue.

Align-Between-Two

Adds a simple menu to the Tools side menu (press N key to toggle Tools panel), then select 2 objects to rotate between, then select the 3rd object that you want to rotate.

Should be compatible with Blender 2.8x, 2.9x, and 3.x
If you find any bugs or want to request a feature please feel free to open a Github issue.

Align-Between-2-Objects-Button

Adds a simple menu to the Tools side bar (press N key to toggle side panel), then select 2 objects to rotate between, then select the 3rd object that you want to rotate.