ACP - "Addon Control Panel." (Allows you to turn on and off addons w/in the game instead of having to log out.)
Better Outbox/Better Inbox
idQuestAutomation (Automatically accepts quests when you click on the quest giver. You can hold shift+right-click to restrict it from accepting that specific one automatically.)
ProfessionTabs (Consolidates all profession tabs into one window.)
PutGuildBack (Puts the guild tab back with the rest of the tabs in the social menu.)
rQuestWatchFrameMover (Allows the quest tracking frame to be moved.)
This pack was configured with 1600x900 wide resolution.
*Note: Most of these addons are either completely or partly configured through the LUA files.