Duplicating object aligned with and on faces I'm trying to duplicate the cube in the image on the center of the faces of the torus facing inwards. I've tried a few things with curve deforms and array modifiers but couldn't get anything to work. Also I might want them to scale with the size of the face.
If this didn't change in the 2.8 (I use the 2.79), choose align to view on the editing preference

Then in edit mode choose the face you want your object to be aligned to
Hit shitf + 7 to get your view parallel to that face and shift D to duplicate the face (now extrude it and you have your cube.

If you need to extrude a face and have it's size to increase with the distance, do it with option + S (on mac)