FlightGear Flight Simulator: free open-source multiplatform flight sim
A free 3D game engine to create games and realtimes scenes for Windows
Skyscrapersim Abandoned
Legandary Story of the Zarakite
A planetarium software that shows a 3D simulation of the night sky
A cross-platform interpreter for many point-and-click adventure games
Simple voxel raycasting engine in SFML with multithreading support
Mahasona engine is an open source game engine.
Engine for games like's а Tyrian with random level generation.
Arcade-style fishing game