Direct3D 7 IM Framework Programming
Microsoft DirectX Developer FAQ
DirectX 8.1 SDK Documentation
I think you know what this is. Yes, it is the documentation for the DXSDK. It's a very good source for information on DirectX related issues.
The DirectX 8.0 Screensaver Framework
August 2001 - Philip Taylor
This article presents the DX8 Screensaver Framework, which is a Microsoft made free framework. The article has links to download the sourcecode for the framework.
The Simplification of DirectX 8.0 Graphics
December 19, 2000 - Philip Taylor
This article is a really good introduction to Direct3D with DX8. It explains everything, how to create devices, how to enumerate, how to handle lost devices, etc. Of course it doesn't explain it in detail so you still need to read the DXSDK docs but at least you will know what to look for.
Introduction to Shader Programming
March 2002 - Wolfgang Engel
This 4 part article shows how to program the vertex and pixel shaders in DirectX 8.x.
July 2002 - Philip Taylor
This article in two parts gives an overview of what the D3DX utility library is capable of.
Rendering to multiple views with DirectX
Sep 2002 - Mythos
This article explains how to create additional swap chains in DirectX to render multiple independent views. Useful for modelling applications.
Saving a Screen Shot in DirectX Graphics
May 2002 - Robert Dunlop
This article shows how to save a screen short in DirectX Graphics.
Triangulating and Extruding Arbitrary Polygons
May 2001 - Michael Fötsch
This article explains how to use the GLU library to perform tesselation of irregular polygons for rendering in DirectX. It also shows how to use GDI to retrieve the polygons of TrueType fonts.
Nov 2002 - Dave Aronson
This article shows what can be done with D3DX in regards to meshes.
Introduction to the DirectX 9 High Level Shading Language
July, 2003 - Craig Peeper, Jason L. Mitchell
This article gives a very good introduction to the HLSL and how to use it with DirectX 9.
MSDN Online DirectX Delevoper Center
The developer relations site of nVidia is full of good articles and demos with source code on 3D graphics.
Managed DirectX 9 Graphics: Improving On A Good Thing
Dez 2003 - Thobias Jones
Managed DirectX with C#
DirectX Device Capabilities Database
This site has a very good capabilities database for DirectX 8 and DirectX 9. I especially like the good user interface of this one.
How to parse .X files
Sep, 2001 - Jim Adams
Shows how to parse X files using DirectX 8, but not the D3DX utility library.
A game developer information site using C++ and DirectX.
Chad Vernon's Tutorials
Plenty of well written tutorials on DirectX 9, both managed and unmanaged.
Lot's of code samples for DirectX, OpenGL, and other things.
A site with lots of cool 3D samples with source code for both OpenGL and DirectX.