Three of the buildings (Rogan's Bar, Hardware store, Sheriff's Office) and the gallows are by 4Ground.
The church and larger adobe house are Renedra
The Billiard Hall and Triumph Oil Co are paper kits (and the only houses without lift-off roofs); don't recall the maker, I've had them over 30 years.
The Gunsmiths and Assay Office are foamcore with printed paper stuck on; someone (again I forget who) did some very nice Wild West stuff free to download years ago.
All the other buildings (bank, saloon, jail, small adobe house, barns) are scratch built from card/wood/balsa