Open CASCADE Technology (OCCT)

Open CASCADE Technology (OCCT) is an open-source geometric modeling kernel that began at Matra Datavision (France) as CAS.CADE, the platform behind EUCLID QUANTUM. When Dassault Systèmes bought the Matra Datavision subsidiary that owned EUCLID STYLER and EUCLID MACHINIST (announced in 1998), CAS.CADE stayed with Matra Datavision, which released it as open source (Open CASCADE 1.0) in 1999 and created Open Cascade SAS in December 2000 to develop and support it. In 2003 IBM bought Matra Datavision and Open Cascade SAS went to Principia; Open Cascade then joined Euriware, the IT services company of AREVA, in 2006-2007. Capgemini acquired Euriware in 2014 and merged it in 2015, so Open Cascade is now part of Capgemini Engineering. OCCT implements full B-rep solid modeling, NURBS surfaces, and standard CAD data exchange formats (STEP, IGES, STL), and it is the kernel inside FreeCAD, Salome, and dozens of academic and industrial CAD tools.