X3D is the open-standard format for 3D graphics scenes on the Web.
A DSL for writing type-safe HTML, XML and RSS in Swift
converts between IGES file and text file
jsonapi.org style payload serializer and deserializer
Editor for Obj files
professional open source software for LCA
Converts between many 3D data formats
Magical Data Modeling Framework for JSON
Can convert from/to many 3D mesh file formats
A Simulator/Tester for the BACnet/WS 2 protocol.