Open CASCADE Technology is a software development platform freely available in open source. It includes components for 3D surface and solid modeling, visualization, data exchange and rapid application development.

Open CASCADE Technology can be best applied in development of numerical simulation software including CAD/CAM/CAE, AEC and GIS, as well as PDM applications.

The Technology exists from the mid 1990-s and has already been used by numerous commercial clients belonging to different domains − from software edition to heavy industry.
(from www.opencascade.org)