Best free "management" games

GAME GENRE – Construction and management simulation (CMS) and strategy games revolve around building, developing, and managing an empire, civilization, company, or other large-scale organization. Players usually start with limited resources and gradually expand by constructing buildings, managing finances, gathering resources, and keeping their population or workforce productive. Research often plays an important role, allowing new technologies, buildings, units, or abilities to become available as the game progresses. Depending on the setting, players may also need to deal with diplomacy, trade, military conflicts, or competition from rival empires controlled by the computer or other players. The basic idea is simple enough: build something impressive, keep the books balanced, and try not to have your carefully planned empire collapse around you.