Babylon.js is described as 'Main features' and is an app in the Development category. There are more than 25 alternatives to Babylon.js for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is Godot Engine, which is both free and Open Source. Other great apps like Babylon.js are Unity (Freemium), Unreal Engine (Freemium), GDevelop (Free Personal, Open Source) and CRYENGINE (Free Personal).
Armory is an open-source 3D game engine with full Blender integration, turning it into a complete game development tool. The result is a unified workflow from start to finish, making you work faster. No more jumping between different applications.
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D engine that enables developers and content creators to build AAA games, cinema-quality 3D worlds, and high-fidelity simulations without any fees or commercial obligations.
Making games as the '80s arcade games. Includes Run'n'Gun, vertical & horizontal Shooters or Platform, makes games as Pac-Man, Commando, 1942, Ghosts 'n' Goblins or Gauntlet, with sprite sheets, pixel art, sound fx, & music. You get arcade feel.