Black ops Hardened edition: it has the old call of duty world at war map packs all four here is the link to download them.
http://www.megaupload.com/?d=YYBOTMFW
http://www.megaupload.com/?d=Q4TSM77L
Tutorial:
I am sure theres plenty more
Next Black ops Strike Dlc of course we all know what that is well every player should, its the newest map pack out there for black ops which on xbox market costs around 1200msp but here are the links and tutorials to get it for free.
Download:
http://www.megaupload.com/?d=9GE96WA8 = strike dlc
http://www.megaupload.com/?d=EG1GDZYT = profile
you need to download both
Tutorial:
The Dlc For MW2 has been already posted in the section with Mw2 so check it out there
For the latest black ops map pack "Rezurection" Click Here