More affordable than ever, 3D printers are booming for personal, professional, and educational use. Here's everything to know before you buy one, along with the top models from our hands-on testing.

Uses ThreeJS/WebGL for 3D rendering and either d3-force-3d or ngraph for the underlying physics engine. See also the 2D canvas version, VR version and AR version. And check out the React bindings.