xeokit SDK
Open source JavaScript SDK for viewing high-detail 3D BIM
...A complete JavaScript graphics toolkit for building BIM and AEC viewing applications. Open source components to build your own product, your way. Keep everything on your own servers. Get your models on the Web using a toolkit of production-proven components that save you costly research, development, and maintenance. Keep data, viewer and conversion tools on your own servers. No overloaded cloud services, or unpredictable costs. No hassles with data protection laws. You get the source code. Customize and extend it however you want. ...