A development environment focused on modding
Fast and lightweight JavaScript game engine built on WebGL and glTF
Cross-Platform C++ 2D/3D game engine
Game engine supporting many 3D/2D formats and graphic effects
GemRB is a portable open-source implementation of the Infinity Engine
Flax Engine, multi-platform 3D game engine
Simple and light-weight 3D game engine
SonarSource Static Analyzer for Java Code Quality and Security
A J2ME emulator for Android
Blockbench - A low poly 3D model editor
Desktop/Android/HTML5/iOS Java game development framework
Java/JavaFX/Kotlin Game Library (Engine)
An iOS & tvOS Frontend for Multiple Emulators
A complete 3-D game development suite written in Java
Magic Another Game Engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
3D Procedural Game Engine Using OpenGL
Dust3D is a cross-platform open-source 3D modeling software
Open game and rendering engine packed into a JavaScript framework
An easy to use 2D HTML5 game engine written in TypeScript
3D and 2D game engine written in Rust
Skript is a Bukkit plugin which allows server admins
Embeddable unity game engine view for Flutter
Lightweight, high-performance HTML renderer for game developers