With Random Rock, you can quickly make rocks of various shapes with one click:

You can choose how to place the created  rock, such as along the axis or on a certain surface :

Once created, you can change the parameters to adjust the size, shape, etc. as needed:

You can click the Delete button to delete the generated object, and click the Done button to form the final mesh object.

Updates

V 1.0.1 :

• The 'Smoother' option is available when the Style is set to 'Normal', which will make the rock look smoother after creation.