LittleJS

Blazing fast WebGL2 + Canvas2D hybrid system allows for high-performance graphics with Shadertoy-style post-processing shaders, as highlighted in the features.

Engine is optimized for small size, making it perfect for competitions like Js13kGames, with a special branch that builds to a 7KB zip.

Packs physics, audio, input handling, and particle effects into a lightweight package, eliminating the need for multiple dependencies.

Includes live example browser with code editor, particle effect design tool, and Tiled level editor import, speeding up development.