ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
Space Engine - Space Engine is a realistic virtual Universe you can explore on your computer.
Tropico - Tropico is an Addictive, Strategy, Construction and Management, City Building, Sandbox and Single-player Simulation developed by PopTop Software.
Celestia - Real-time 3D visualization of space
STAR WARS Galactic Battlegrounds Saga - STAR WARS Galactic Battlegrounds Saga is an Action, Real-time Strategy, Combat, and Multiplayer video game created by Ensemble Studios.
Stellarium - Stellarium is a free open source planetarium for your computer.