Two.js

Examples at: two-js/.

JavaScript library, works both on browser and headless with Node.js to SVG.

Feels good. Maybe not ultra featured, and could have more simple examples in docs, but still good.

Vs Paper.js github.com/jonobr1/two.js/issues/319

One of the main features of Two.js appears to be the fact that it can natively render to either SVG and canvas, rather than creating SVG through DOM hacks as done by other projects.