source code making WOK no longer necessary for OCCT development. Working with IFC Files The Open CASCADE IFC Import SDK provides applications with the capability of reading BIM data from files in IFC format. It supports versions IFC2×3 and IFC4 that used by most modern applications. This allows visualization and manipulation of building geometries and CAD designs. External tools are available to convert from Open CASCADE to IFC as well. CAD Programs based on Open Cascade Technology Several CAD programs rely on Open CASCADE Technology including: FreeCAD an open source, 3D parametric modeler, with support for building information modeling, finite-element-method (FEM), and Python scripting. SALOME an open source platform for pre- and post-processing for numerical simulation. KiCad an open source suite for electronic design automation (EDA). Gmsh an open source finite-element mesh (FEM) generator. Since version 3.0, Gmsh supports full constructive solid geometry features, based on OCCT. FORAN an integrated CAD/CAM/CAE system developed by SENER for the design and production of practically any naval ship and offshore unit. FORAN uses OCCT since V80R2.0 release for working with analytical surfaces. JSketcher a browser based parametric 3D modeler. IFC Open Shell, a Python library for working with IFC data. Uses Open CASCADE internally to convert the implicit geometry in IFC files into explicit geometry that any software CAD or modelling package can use. See also Free hardware List of CAx companies Computer-aided design Open Design Alliance Building Information Modeling Industry Foundation Classes References Free computer-aided design software Free software programmed in C++ Computer-aided design software for Linux Computer-aided manufacturing software for Linux Computer-aided engineering software for Linux 3D graphics software