Free, Open Source C# 2D and 3D Game Engine.
Stride is an open-source C# game engine for realistic rendering and VR. The engine is highly modular and aims at giving game makers more flexibility in their development. Stride comes with an editor that allows you to create and manage the content of your games or applications visually and intuitively.
The HTML5 Creation Engine. Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.
This project aims to provide a fast, lightweight 2D library that works across all devices. The PixiJS renderer allows everyone to enjoy the power of hardware acceleration without prior knowledge of WebGL. Also, it's fast. Really fast.