Unity - The multiplatform game creation tools for everyone.
Filecamp - Digital Asset Management & Online Proofing tools beautifully integrated, into one secure and cost-effective solution. Manage all your digital marketing assets from your own good-looking, easy-to-use spot in the cloud. Unlimited users in all plans!
Godot Engine - Feature-packed 2D and 3D open source game engine.
Bynder - Bynder is a cloud-based digital asset management solution for marketing professionals looking to simplify how they manage digital content via one central portal.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Connecter - Connecter is a 3d asset manager. It's like Adobe Bridge, but for 3d assets instead of pictures.