Here's the more popular dozen or so: https://github.com/collections/javascript-game-engines

If you want to know about the really small indie ones that are less for actual use and more for just "I want to make a game engine" I would check out the various gamedev Discord and Reddit channels. There's always people showing off their work.

Yeah, I was thinking more terms of pico8 where you have the the editor which basically has everything included to make the game.

Thanks! Looks promising.

2d phaser (photonstorm) 3d babylonjs (microsoft)

Phaser, as game engine, Pixi.js as a powerful render library (FRVR.com games were made formerly with Pixi.js). You can use Cocos Creator (not Cocos2D-x)

They’re more like frameworks or libraries. CC isn’t open source and the editor doesn’t work on Linux.