I would also recommend Nafziger's huge OOB collection.
The collection has OOB from 1938 to 1945
It has extensive OOB for specific campaigns and theatres.
They are first sorted by year:
939: 1939
945: 1945
Then sorted by nation:
A: Allied
B: British/Canadian
C: Chinese
F: French
G: German
I: Italian
J: Japanese
K: Rumanian
P: USMC/Indian
Q: Finland
R: Russia
You can search the OOB, or download a complete list of what’s available here:
http://www.cgsc.edu/carl/nafziger.htm
The complete list of OOB is here:
http://www.cgsc.edu/carl/nafziger/index.asp
Manuals
The Research Library also has technical manuals for various weapons and equipment (mostly US) found here:
http://www.cgsc.edu/carl/wwIItms/index.asp
And tactical and weapon handbooks for various nations here:
http://www.cgsc.edu/carl/wwIIspec/index.asp
Which includes the following titles:
1 British Commandos
2 The German Armored Army
3 German Military Training
4 The German Motorized Infantry Regiment
6 Artillery in the Desert
7 Enemy Air-Borne Forces
8 German Tactical Doctrine
9 The German Squad In Combat
10 German Antiaircraft Artillery
11 Morale-Building Activities in Foreign Armies
12 German Military Abbreviations
13 British Military Terminology
14 German Infantry Weapons
15 German Coastal Defenses
17 German Doctrine Of The Stabilized Front
18 German Winter Warfare
19 Japanese Infantry Weapons
20 German Ski Training And Tactics
21 German Mountain Warfare
22 Company Officer's Handbook Of The German Army
23 Index to Intelligence Publications
25 Japanese Field Artillery
26 Japanese Tanks and Tactics
27 Soldier's Guide to the Japanese Army
29 Japanese Defense Against Amphibious Operations
32 Japanese Parachute Troops
34 Japanese Tank and Antitank Warfare
35 German Methods Of Warfare In The Libyan Desert
Cross