Oculus Medium - Sculpt, model and paint in virtual reality on a 3D canvas.
Tilt Brush - Paint in spaces around you with Virtual Reality
MasterpieceVR - Powerful VR sculpting & painting tool
A-Painter - Paint in VR in your Browser
Quill by Story Studio - Paint in virtual reality on an infinitely scalable canvas
VR Sketch - A tool for designers to draw inside virtual reality