Navisworks IFC Exporter
CellBIM Viewer is a free BIM IFC Viewer and CellBIM xlsx Viewer.
You can open all types of IFC files including IFC 4.2 specification and view the design tree, properties and quantities.
Use the Rubberband to Pick IFC Elements and get aggregated quantities that are calculated from the powerful CellBIM Engine.
You can also use CellBIM Viewer as a Viewer to files created from the Licensed versions of CellBIM and Cell2D.