I've seen this site mentioned a couple of times in the CWC threads, but it's also useful for those gaming WW2
Barry Bedlam's Armoured Acorn
http://www.armouredacorn.com/index.html There are excellent colour prints ( and plenty of photos) of WW2 and Modern Canadian, Commonwealth and NATO AFVs and other vehicles here, showing markings and cam patterns.
In addition here are clear, and concise ORBATS and TO&Es for Canadian, Commonwealth, NATO and Soviet/Warsaw Pact formations from Battalions to Divisions for both the Second World War and Cold War Periods.