The Ruby 2D gem
Highly Optimized Graphics Math (glm) for C
A completely free, open-source, 2D game engine
OBS Linux Vulkan/OpenGL game capture
Cross-Platform C++ 2D/3D game engine
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Phaser is a free and fast 2D game framework for making HTML5 games
A Java math library for OpenGL rendering calculations
Cross-platform 2D game engine focused on ultimate productivity
Easy to use Python library for creating 2D arcade games
Classic 2D side-scrolling platformer game
Vulkan renderer mod for Minecraft
Agent Skill for generating 2D sprite sheets and map, transparent PNG
Pymunk is a easy-to-use pythonic 2d physics library
A Vulkan and OpenGL overlay for monitoring FPS, temperatures, CPU/GPU
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL
Cross-platform 2D and 3D game engine with modular architecture
LayaAir is an open-source 2D/3D engine
A dead simple 2D game engine for Go
A game engine powered by python and panda3d
Interactive data visualizations and plotting in Julia
Voxel game engine in C++ with OpenGL
A Minecraft mod designed to improve frame rates
Modern OpenGL binding for Python
Desktop/Android/HTML5/iOS Java game development framework