>>315954776
Oculus medium is probably the most developed, but they got sold to adobe sadly. Masterpiece VR is similar, I tried the free trial a bit but it was buggy. Gravity sketch is more CAD, haven't tried. Quill and tilt brush are more "3d painting" than sculpting, but kinda cool if you like their style. Kanova is dead, but free on steam. Google blocks does basic poly modeling, also dead.

Also worth mentioning is maquette, which isn't really a modeling tool (bills itself as a "prototyping tool") but it's honestly the one I've gotten the most use from for laying out worlds from primitives.