fheroes2 is a recreation of Heroes of Might and Magic II game engine
A retro game engine for Python
Dust3D is a cross-platform open-source 3D modeling software
Java/JavaFX/Kotlin Game Library (Engine)
LayaAir is an open-source 2D/3D engine
3D and 2D game engine written in Rust
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Skript is a Bukkit plugin which allows server admins
A Flutter based game engine
Everything you need to build and deploy scalable realtime 3D apps
Godot Kotlin JVM Module
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
SonarSource Static Analyzer for Java Code Quality and Security
Doom-based AI research platform for reinforcement learning
3D Procedural Game Engine Using OpenGL
Open source clone of the Age of Empires II engine
ThinkPHP Framework
RenderDoc is a stand-alone graphics debugging tool
The App Framework for Startups
The game engine for everyone
3D game engine/framework in C, with Luajit and Python bindings now
Open-source full-stack web development framework built on top of React
An open source re-implementation of Chris Sawyer's Locomotion
An open source C++ game engine