This viewer uses web-ifc 0.0.78, unmodified, under MPL-2.0.
Licence: assets/web-ifc-LICENSE.txt
Corresponding source and build instructions: https://github.com/ThatOpen/engine_web-ifc/tree/4310503d8618a0870c2166f101471078d528f4c1

Three.js 0.180.0: MIT; see assets/three-LICENSE.txt
Inter Variable: SIL Open Font License; see assets/inter-LICENSE.txt