Arianne is an engine to develop multiplayer online games like Stendhal
lua dev plugin for unreal engine 4 or 5
JavaScript framework to build game engines, games, emulators and apps
Java Settlers
8-bit Graphical API for Java
Multidocument automation by templates - for sphinx, mkdocs, epydoc ...
An environment to develop games based on a rectangular board
Asphyre is a cross-platform framework for Delphi and FreePascal.
Perl bindings to the Modern OpenGL API
3D .NET engine for Windows, Linux, Mac
A game engine written in the D programming language
Multimedia asset management and manipulator for Étoilé
A generic 2D engine for any kind of game
AutoTeach makes kids study and learn in exchange for internet access.
Java Gamepad API for multiple platforms
TurboSphere is an easy to learn and powerful JS based game engine.
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