Here I'm gonna be posting designs that people ask me to make, designs I might make in the future, and designs that I have no idea where they came from, starting with this trio:
Random Civ I
UA: Homeland Deserters
Trade units sent to\ from your empire grant reveal adjacent tiles and yield +1
science for the owner and +1
gold for the receiver per each 3 tiles they pass. The range of
trade routes is increased by certain technologies*.
UB: Traveler's square
Replaces Caravansary. Unlocked at currency, and is more expansive to build. However, it doubles the range of land
trade routes from this city. It also contains a writer specialist that provides +1
GW point per each trade route to and from the city when filled.
UU: Cartographer
Replaces great writer. Instead of its abilities creates unique
maps that provide additional
tourism and
science instead of culture, and permanently increase the range of
trade routes by 5%(to a maximum of 50%).
*Writing, Philosophy, Physics, and Navigation.
Random Civ 2
UA: Conqueror of the Rings
Cities gain additional territory and start a WLtKD at the
capital upon conquest. WLtKDs reduce the cost of acquiring new tiles by a % percentage equal to the city's population and grant +1
culture from military buildings empire wide. The capital may always expand to new tiles.
UU: Cyberlord
Replaces great general. May be consumed to initiate an invasion, granting adjacent military units double movement, ignore terrain costs and enemy ZOC for 5 turns (doubled for units that require iron). During that time, receive no
unhappiness from conquered\
puppet cities.
UB: Garrison's Post
Replaces barracks. Yields and additional +1 XP for each conquered city its present in, and +5 per each
puppet its present in. Costs no
gold to maintain, and reduces
unhappiness from population by 1% per each city you conquer(2% from
puppets).
Random Civ 3
UA: Naturally Protected
Upon settling a city, gain
production towards defensive\ maritime buildings per each coast and mountain tile within the city's range and in your territory. Cities gain +1
strength per each mountain and 2 coasts in their territory, and gain a
food boost equal to 20% of their
strength.
UI: Wooden Camp
Unlocked at construction. May be built on non- hill grassland\ tundra, and not adjacent to each other. +1
food, and +1 food and
culture if adjacent to mountain or a source of water(bonuses doubled If stack). Generates +2
strength if adjacent to a mountain, and +1
production near a coast.
UU: War- Migrant
Replaces warrior. Unlike it, may embark from the start, and receives immunity as well as 20%
combat boost in any tile that provide attrition, except for jungle(with ExCE). Heals if ends the turn on a Wooden camp.
faith during 
war and peace treatise. Unqiue luxuries may appear on cities and jungle tiles you claim in continents other than your capital's(max. 2 per city).
movement and grants a higher combat boost(25%). Units within his range the "Palapa oath" promotion, granting them +2% 
.
happiness from each national wonder)
citizens in a city).
c5influence: influence resting point with all CS increased by 15)
