Open-source engine for Heroes of Might and Magic III
Engo is an open-source 2D game engine written in Go
Urho3D Game engine
Java/JavaFX/Kotlin Game Library (Engine)
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
The AWS GameKit Plugin for Unreal
Kotlin extensions for the libGDX game framework
A multi-purpose file manager for the Nintendo Switch
Open source reimplementation of GTA San Andreas game engine in Unity
An award-winning drawing program for children of all ages
3D Engine c++
Domination is a game that is a bit like the board game Risk
A MUD client for Android, iOS, Linux, Mac OS X and Windows
GEDKeeper - opensource and crossplatform genealogy management program
TKD Scoring Wi-Fi Server supporting Android and IPhone clients
GemRB is a portable open-source implementation of the Infinity Engine
0 A.D. is a free, open-source, cross-platform real-time strategy game.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
3D modeler, 3D game maker, 3D demo maker
Android, UIQ 3.0, Series 60 Edition 5 open-source software
INSTEAD - Simple Text Adventure Interpreter.
Free Texas Holdem Poker game using HTML5, CSS and JavaScript
Download Arceus X Neo an upgraded version of Arceus X
Cross-platform 2D game engine (+ full OpenGL, +full OpenGL ES )