lua dev plugin for unreal engine 4 or 5
Arianne is an engine to develop multiplayer online games like Stendhal
JavaScript framework to build game engines, games, emulators and apps
Java Settlers
8-bit Graphical API for Java
An environment to develop games based on a rectangular board
Asphyre is a cross-platform framework for Delphi and FreePascal.
3D .NET engine for Windows, Linux, Mac
A game engine written in the D programming language
Multimedia asset management and manipulator for Étoilé
AutoTeach makes kids study and learn in exchange for internet access.
A generic 2D engine for any kind of game
Java Gamepad API for multiple platforms
A multiplatform game engine for interactive fiction experiences
An extensible development framework for roleplay games.
Pear3DEngine is a modern and modular 3D development framework
An HTML web game platform
Game framework on top of Python, Panda3D and Twisted
Atlarius is no longer under development.