I just took these from my bookmarks, they are are a majority of the quests offered in Wrath of the Lich King that provide "blue items" for completion. Most of them require a dungeon run (d), there is a couple of group quests (g) and a few of them require some prerequisite quests (c) a couple of long quest chains (ccc) but mostly they are easy simple quests with big and helpful rewards to leveling in Northrend.
*These were done on alliance a couple of them might not be available to horde.