Skyscraper 2.0 Alpha 7 041111
A fully-featured, modular, 3D realtime building simulator, powered by the Scalable Building Simulator (SBS) engine
Many more things are planned, including gaming support (single and network multiplayer), and a graphical building designer. Skyscraper is written in C++ and uses the Crystal Space 1.4 graphics engine, the wxWidgets GUI library, and is multiplatform. The current versions aim for a future 2.0 release.