Xaw3d is an enhanced version of the MIT Athena Widget set for the X Window System. Xaw3d adds a three-dimensional look to applications with minimal or no source code changes.
You should install Xaw3d if you are using applications which incorporate the MIT Athena widget set and you'd like to incorporate a 3D look into those applications.
The library is available as 32-bit and 64-bit:
Current version: v1.6.2-1