Coin is a retained mode 3D graphics rendering library based on
OpenGL. It is implemented in C++ and simultaneously released as Free
-Software under the GNU General Public License ("GPL") and under a
-Professional Edition License for developers of proprietary
-software. The application programmer interface (API) is based on the
+Software under the 3-clause BSD license.
+The application programmer interface (API) is based on the
API of Open Inventor, the de facto standard 3D graphics library for
complex visualization purposes.