lua dev plugin for unreal engine 4 or 5
Gideros Release version
Arianne is an engine to develop multiplayer online games like Stendhal
JavaScript framework to build game engines, games, emulators and apps
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
Java Settlers
8-bit Graphical API for Java
Source code of the chapters of the book 3D Game Development with LWJGL
3D .NET engine for Windows, Linux, Mac
evolution for vegastrike SpaceSim/Combat/Trade game
Java decentralized cross-platform network multiplayer game engine
Gives agents personality, moods, emotions and emotional attachments.
A generic 2D engine for any kind of game
C++ game libraries plus server.
Hungry Hero is an open source Flash game built on Starling Framework.
A truly extensible cross-platform game engine
Cross-platform reimplementation of AMOS BASIC (runtime)
AMOS BASIC reimplementation in Java
Game framework on top of Python, Panda3D and Twisted
also download updates from files section
Read and write PGN format and test moves for legality.