IfcOpenShell

• http://blog.ifcopenshell.org
• https://sourceforge.net/p/ifcopenshell/discussion/
• http://blog.ifcopenshell.org/2011/08/ifcopenshell-needs-your-help.html
• https://github.com/IfcOpenShell/IfcOpenShell
• https://github.com/IfcOpenShell/IfcOpenShell/fork
• http://opencascade.org
• https://github.com/tpaviot/oce/
• https://sourceforge.net/project/project_donations.php?group_id=543113
• http://opensourcebim.org
• http://archikey.com
• http://twitter.com/aothms