FZKViewer is described as 'visualises the sematic data models IFC, CityGML und gbXML. Supported Versions: IFC 2x, IFC 2x2, IFC 2x3 and corresponding ifcXML; CityGML 0.4.0, CityGML 1.0.0, CityGML 2.0.0, ADE Noise, ADE Subsurface Structure, ADE Bridge'. There are four alternatives to FZKViewer for Windows, Mac and Online / Web-based. The best alternative is BIM Vision, which is free. Other great apps like FZKViewer are usBIM.viewer+ (Free), Solibri Model Viewer (Free) and Bimsync (Paid).
Freeware IFC model viewer. It allows to view the virtual models coming from CAD systems like Revit, Archicad, Advance, DDS CAD, Tekla, Nemetschek VectorWorks, Bentley, and others without necessity of having commercial licenses of these systems.
Do you need to open an IFC file and modify it? usBIM.viewer+ is the only freeware certified by buildingSMART International that allows you to view, edit, convert and share BIM models in the IFC format. Basically, it is more than just a viewer!.
Solibri Model Viewer (SMV) is the software that everyone should use within the construction industry. It’s free of charge and allows you to open all Standard IFC and Solibri Model Checker Files. Transparency is given on open issues and challenges.
bimsync helps projects collaborate, share models (BIM), files and documents online. Architects, contractors, consultants, engineers and owners use bimsync to communicate ideas, reach consensus faster, make less mistakes, reduce latency and costs.