Vikings ~ Sagas (+25% science, +10% culture - replaces library)
Germany ~ German factory (+75% production with power - replaces factory)
Gaul ~ Magic pot (New units recieve +7 experience (+100 experience if they're in a war vs. Rome) - replaces barracks)
Holland (if they'll be included) ~ Dutch port (New naval units recieve +5 experience - replaces harbor)
Greece ~ Amphitheatre (+12 culture for every 20% culture rate, +2 happiness - replaces theatre)
Carthage ~ Slave market (+25% commerce, +25% production - replaces market)
Rome ~ Baths (+3 health, +2 happiness - replaces what??)

Aztec ~ Cocoa grocer (+3 happiness for every resource giving +1 happiness, 20% commerce - replaces grocer)
America ~ K-Mart (+3 health for every resource giving +1 health, +20% commerce - replaces supermarket)
Mali ~ Clay market (+35% production, +15% commerce - replaces market)
Spain ~ Bullring (+2 happiness, +10% culture - replaces colosseum)
Egypt ~ Obelisk of Ra (+10% culture, +10% science - replaces obelisk)
Japan ~ Courthouse of Shoguns (-75% maintenence cost - replaces courthouse)
France ~ Swiss Bank (+125% commerce - replaces bank)
China ~ Gunpowder city walls (+75% city defence, also vs. Gunpowder units - replaces walls)
Got no more ideas, will edit when I get them
