The Tiny JavaScript Game Engine That Can!
Voxel game engine in C++ with OpenGL
Xash3D FWGS engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
An easy to use 2D HTML5 game engine written in TypeScript
A .NET ascii/ansi console engine written in C# for MonoGame and XNA
A dead simple 2D game engine for Go
Open source library for creative expression on the web, desktop, etc.
A cell-based puzzle game featuring classic and completely new puzzles
Haskell game engine library for roguelike dungeon crawlers
Rust library to create a Good Game Easily
2D game development library for Ruby and C++
A hand-crafted 2D game library in Go
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
A 2d physics game engine for JavaFX
Mahasona engine is an open source game engine.
A generic 2D engine for any kind of game
C++ OpenSource Game Fabric based on SDL2
A free ActionScript 3 library designed for developing 2D Flash games
A lightweight HTML5 Game Engine
Cross-platform 2D game engine