3D Matrix Transformations by Voltaire of OTM /code/3d/docs/otmmatx.zip	18 Jan 1998 (catalog date) 13,676 bytes
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Good tutorial on 3D transformations using matricies.

OTM Phong by Voltaire of OTM /code/3d/trifill/phong/otmphong.doc	08 Jun 1997 (catalog date) 23,949 bytes
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Good tutorial explaining how to approximate phong shading using a model based on linear interpolation of angles.

3D Engine by Voltaire of OTM /code/effects/3d/otm3d095.zip	01 Dec 1997 (catalog date) 254,469 bytes
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Supports lambert and gouraud shading.

OTM Voxel by Voltaire of OTM /code/effects/land/otmvoxel.zip	10 Jan 1997 (catalog date) 187,665 bytes
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Tries to explain what voxels really are - Most people will ignore the difference anyway. :( And this example leaves much to be desired.