Ct.js is a desktop game engine that makes learning programming fun
Cross-platform 2D game engine focused on ultimate productivity
Stride (formerly Xenko), a free and open-source cross-platform C# game
Cross-platform 2D and 3D game engine with modular architecture
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
All-in-one game engine built on Godot. Roblox & UEFN alternative
Ze Text Adventure game Builder : Create as you play !
MIT Licensed Open Source version of Torque3D from GarageGames
2D Game Engine with Lua Scripting made on top of SFML
Web powered cross-platform 3D, WebXR game engine
Godot is a fully featured, open source, MIT licensed, game engine.
Visual Novel engine, editor and game development.