A free implementation of the OpenGL API -- runtime Mesa is a 3-D graphics library with an API which is very similar to that of OpenGL. To the extent that Mesa utilizes the OpenGL command syntax or state machine, it is being used with authorization from Silicon Graphics, Inc. However, the author makes no claim that Mesa is in any way a compatible replacement for OpenGL or associated with Silicon Graphics, Inc. This package provides a simple widgets library, libGLw, which allows Motif-based applications to embed an OpenGL drawing context. On Linux, this library is also known as libGLw or libGLw.so.1.