What are some alternatives?
When comparing Kodon and Quill by Story Studio, you can also consider the following products
A-Painter - Paint in VR in your Browser
Oculus Medium - Sculpt, model and paint in virtual reality on a 3D canvas.
MasterpieceVR - Powerful VR sculpting & painting tool
VR Sketch - A tool for designers to draw inside virtual reality
Kingspray Graffiti - Collaborative graffiti simulator with realistic spray and drip effects.
Blocks - Empowering designers to build great websites without writing a line of code. For web and OS X.