Enhanced UI
I use a modified ContinentsPlus map script to restore normal City-State placement (instructions at http://forums.civfanatics.com/showthread.php?t=453587)
NOTE: The first mods listed with a (#) before their name are part of the Community Patch and can be installed using a single automated installer. Download at http://forums.civfanatics.com/showthread.php?t=528034

(1) Community Patch
(2) Community Balance Overhault
(3) CSD for CBP
(4) Civ IV Diplomatic Features
(5) More Luxuries
(6a) Community Balance Overhaul - Compatibility Files (EUI)
AI - No Zero Value Trade Items
Buildings - Lighthouse Near Sea
Diplomacy - By Numbers
Diplomacy - Tech Bonuses
Faster Aircraft Animations
Global - Air Routes
Global - Allies Block Blockades
Global - Barbarian XP Level 3
Global - Capture Great People
Global - City State Airbases
Global - City Working Distance
Global - Civilians Move After Purchase
Global - Commander Influence Borders
Global - Fortify Almost Healed
Global - Grateful Settlers
Global - Local Generals
Global - No Ocean Plundering
Global - Pro-rata Buildings Purchase
Global - Religious Settlers
Global - Remove Ghost Routes
Global - Terrace Farms Extension
Global - Trading Posts Flat Land
Global - Units Awake in Danger
Global - Unlimited Units Per Tile
Global - XP For Scouting
Goody Huts - Tech Refund
Hidden UI Screen Shot Mod
InfoAddict
Ingame Editor
Mechanized Infantry with Soldiers, Resized
RemoveBanLuxury
Promotions - HeliAirRecon
Quick Turns
R.E.D. Modpack
R.E.D. Xtented
Really Advanced Setup
Religion - Fixed Prophets
Religion - Recurring Purchase Notify
Reseed!
UI - Antiquity Site Tooltips
UI - City Production
UI - Condensed Promotions
UI - Enhanced Demographics
UI - Religion Spread
UI - Summary Clock
UI - Trade Routes Enhancements
UI - Unit List Enhancements
Units - Population
Units - Subs Immune Under Ice
Yet (not) Another Earth Maps Pack