OpenTTD - An open-source clone of the classic game ...
SimCity BuildIt - Build, craft, and control! SimCity BuildIt is an all-new SimCity game designed just for mobile.
Simutrans - Simutrans is an open-source transport simulator.
Cities: Skylines - Cities: Skylines is a Construction and Management, City Building, and Single-player Simulation developed by Colossal Order and published by Paradox Interactive.
Citybound - Open-source city building sim with a focus on realism through microscopic details
eCity - eCity is a city simulation game where you are challenged to solve different engineering issues.