XSeen is a tool for the purpose of developing the next generation standard for declarative 3D and Virtual Reality content on the Web. It is designed to function completely integrated with the DOM and incorporate the best features of X3D, A-Frame, and other declarative 3D languages. It is written in JavaScript and built upon THREE.js. It is fully open source with the code base dual-licensed as MIT and GPL. The documentation is Creative Commons Share-Alike.