Phaser is a 2D game engine for both Desktop & Mobile browser games, with just about everything needed to make a 2D game: physics, audio, animation, particles, etc.
Dungeondraft and Wonderdraft, Godot and whatnot. Share tools, mods, assets (mention the license!), etc.
Let's take advantage of threading: post the tool up top, and any stuff for it goes in a reply. Keeps things tidy. Or creates chaos. One way to find out!