There are several cool items in the game, but the fallout wiki is the best place to go for a full list of every item in the game.
http://fallout.wikia.com/wiki/Fallout_Wiki
http://fallout.wikia.com/wiki/Category:Fallout_3_items This is a list of all items in Fallout 3, and how to obtain them.
Dompster
You have to much equipment and should repair stuff (if you can) or ditch some heavier items like extra armor.
There are no cheats or codes for Fallout 3 on a console.
COC AgathasHouseInterior This takes you to Agatha's home
Downloadable Content for Fallout 3 for PS3Yes, there is downloadable content for Fallout 3 for PS3. Check in the PlayStation store online.
you can't use the G.E.C.K to mod 360, but there are some modding programs where you can. You will need a USB.
Morrowind and fallout 3.
Occasionally Fallout: New Vegas will freeze, but not as frequently as Fallout 3.
fallout 3 psp??????
There is no such place in fallout 3.
Fallout 3, Fallout 3: Game of The Year Edition, Fallout 3: Broken Steel/Operation Anchorage/Mothership Zeta/The Pit/Point Lookout