Yeah!!! I finally get to bust out my links file:
I don't know how many of these are useful, but I have used them all at some point

Fast square root
http://www.gamedev.net/community/forums/topic.asp?topic_id=139956

3D Animators
http://www.anim8or.com/main/index.html

general
http://www.gametutorials.com
http://www.gamdev.net
http://www.cpp-home.com/
http://www.ultimategameprogramming.com/index2.php
http://www.cprogramming.com
http://www.wotsit.org/
http://cplus.about.com
http://www.angelcode.com/refdb/default.asp?url=%2Frefdb%2Flist%2Easp%3Flist%3Dallrsrc%26description%3Dno
http://www.delphi3d.net/articles.php

SDL
http://andrew.textux.com/Articles.html
http://lair.gamedeveloper.net/programming/articles.php
http://cone3d.gamedev.net/cgi-bin/index.pl


Direct X
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndxgen/html/directx9devfaq.asp
http://www.davesprogramming.com/section_tutorials/directx/directx.htm
http://www.andypike.com/tutorials/directx8/
http://www.geocities.com/SiliconValley/Way/3390/
http://www.gamasutra.com/features/20010629/geczy_pfv.htm
http://direct3d.info/
http://www.riaz.de/download/source.html

Side Scrolling
http://www.2dgame-tutorial.com/Tutorial_9.htm

Engine
http://www.gamedev.net/reference/programming/features/enginuity1/
(Dang it, where did all the other ones go, ill be back)

Artificial Intelligence
http://www.generation5.org/content/2000/robotics.asp
http://ai-depot.com/
http://www.gameai.com/
http://www.gamedev.net/reference/articles/article545.asp

A* Pathfinding
http://www.gamedev.net/reference/programming/features/astar/

Terrain
http://www.robot-frog.com/3d/hills/index.html
http://www.naturewizard.com/tutorials.html
http://www.gamedev.net/reference/articles/article1842.asp
http://www.gameprogrammer.com/fractal.html

(Theres more where that came from if you need it...)

Haven't seen anyone mention this one:
http://triplebuffer.devmaster.net/
I thought their Tetris Tutorial (click) was good for beginners. Also lots of good DirectX tutorials.