IFC viewer - HoareLea/SAM_IFC GitHub Wiki
FZKViewer from Karlsruhe Institute of Technology
Click here to get access tp IFC viewer 'FZKViewer', where you can upload your IFC files as well as gbXML, CityGML and PointCloud, to view, pan, and rotate models. Great news is that you do not need to install just download and open from folder.