Wonders added so far. Feel free to criticize, critique, or correct. Positive feedback also welcome.
Morgan's Purified Air System
-available with Air Purification tech, is a World Wonder
-costs 300 hammers, grants +3 health in city, +1 globally
Fungus Amongus
-available with Symbiotic Bacteria tech, is a World Wonder.
-costs 350 hammers, grants free Mushroom Farm to all of your cities.
Lunar Point
-available with Low-G Combat tech, is a National Wonder.
-requires 1 level 4 unit to build, double production speed with Tungsten.
-costs 200 hammers, grant free Military Station to all of your cities.
Public Theater
-available with Public Liberties tech, is a World Wonder.
-costs 200 hammers and grants free Theater in your cities.
Obviously the costs might be low, but the idea is there. A few more coming, but maybe not tonight.