Vectary - Vectary is a free, online 3D modeling tool and sharing platform.
MasterpieceVR - Powerful VR sculpting & painting tool
Modelo - 3D design collaboration reimagined
Oculus Medium - Sculpt, model and paint in virtual reality on a 3D canvas.
VR Sketch - A tool for designers to draw inside virtual reality
A-Painter - Paint in VR in your Browser