Umber - Vodka
Skags - Quarry, as it is rich in granite and marble, Whaling
Sunderland - Naval base to stop naval attack from South and transit point between North and rest of eastern Westeros
Hard (Hardhome)- Trade with free folk and North
Reed - Rice and wine (main profit in winter as rice is sold minimally in summer to conserve food for winter)
Dustins - Beetroot and sugar.
Ryswell - Horse breeding, medieval world. Horse is used in everything.
Burleys - Quarry for different stones, mines.
Dreadfort - Mines
Blacks (Wolfswood)- Maple and birch trees, sugar.
Mormonts - Ice trade, Military port due to natural harbor and constant attack of ironborn.
Sea Dragon Point - Military port because of natural coves.
Karstarks - A small port and timber trade with Braavos, whaling.
Widow's Watch - Las Vegas of this world.
Locke - Glass Industry
Flint's Finger - Fruits and wines
Hornwood - Paper making and printing press.
Gift - Apple, Oranges, some grains, brandy
Twins (in future) - Major producer of grains for North and whiskey
Starks - A little bit of everything plus soap and perfume, bricks and concrete.
Manderly and Frost earns by giving all of them a port to trade with and shipbuilding.