Project Task: export
PiXYZ Studio
FBX2glTF (Facebook)
FBX2glTF (ClayGL)
glTF API
Verge3D
Unity Exporter (Sketchfab fork)
import
PBR extension for SketchUp
PBR Material Editor, glTF Exporter, PBR Viewport
PBR Material Editor, glTF Exporter, PBR Viewport