1. 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 want to incorporate a 3D look into those applications. From Redhat 8.0 RPM

2. cute 3D replacement for the X Athena widget set [libc5] Xaw3d is a set of 3-D widgets based on the R6.1 Athena Widget set, which adds a three dimensional appearance on some of the widgets of X11 applications dynamically linked against libXaw. This is the libc5 version of xaw3dg library, provided for compatibility with libc5-based programs linking to Xaw3d. This library doesn't contain 3D scrollbars ("arrowscrollbars"), either, please read /usr/share/doc/xaw3d/scrollbars for more information. From Debian 3.0r0 APT