Free Code Editors with SVG Preview

code.visualstudio.com/

SVG 1.4.5 extension recommended for previewing in VisualStudio Code

brackets.io/

SVG Preview extension recommended for preview in Brackets

Open Source 3D Editors

webglstudio.org/

echou.xyz/taro/editor/

litescene.js

xeogl.org/

medevel.com/16-webgl-opensource-frameworks/

clara.io/

babylonjs.com

threejs.org/editor/

nunustudio.org/editor/index.html

vectary.com/