Open-source Android/Desktop remake of Civ V
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
A community sourced database of game controller mappings
A dead simple 2D game engine for Go
Cross-platform game engine in Rust
Open source library for creative expression on the web, desktop, etc.
Game engine to build text adventures.
A MUD client for Android, iOS, Linux, Mac OS X and Windows
INSTEAD - Simple Text Adventure Interpreter.
A promising chess program
quiz game with spin wheel
Character animation system for games and simulations.
eGPXviewer is a 3D GPX track viewer
Children's learning programming language Karel the Robot in 3D
Asphyre is a cross-platform framework for Delphi and FreePascal.