If you like swashbuckling pirates, you may want to check out the new Age of Piracy modpack available on http://civmods.com/aopdemo.htm
Description from the website: Run up the jolly roger and set sail for a life of infamy! You are about to enter the Golden Age of Piracy. A king's ransom awaits you on the high seas, if you're bold enough to claim it! Age of Piracy 3.0, written by Shay Yates Roberts, is unlike any mod pack you have experienced. It contains 74 new units, 46 new technologies, 26 new city improvements and 13 new wonders. It can be played solo or multiplayer, on land or at sea. Choose from eight civilizations to play, including two ruthless pirate clans. All civs have distinct personalities, special abilities, and unique units.
Description from the website: Run up the jolly roger and set sail for a life of infamy! You are about to enter the Golden Age of Piracy. A king's ransom awaits you on the high seas, if you're bold enough to claim it! Age of Piracy 3.0, written by Shay Yates Roberts, is unlike any mod pack you have experienced. It contains 74 new units, 46 new technologies, 26 new city improvements and 13 new wonders. It can be played solo or multiplayer, on land or at sea. Choose from eight civilizations to play, including two ruthless pirate clans. All civs have distinct personalities, special abilities, and unique units.