The Low Poly GameDev Bundle:
https://www.humblebundle.com/software/low-poly-game-dev-bundle-software?partner=gamefromscratch

This bundle is a collection of assets from Eldamar Studio and AnimPic Studio and is entirely composed of 3D low polygon style 3D asset packs. All of the Eldamar assets are in FBX format and can easily be used in any game engine out of the box. The Animpic assets are in Unity and Unreal Engine formats, but can easily be exported and used in other game engines.

Links
https://www.humblebundle.com/software/low-poly-game-dev-bundle-software?partner=gamefromscratch
https://gamefromscratch.com/low-poly-game-dev-humble-bundle/

The above links contain a code that enables you to direct a portion of your purchase to support GFS (and thanks so much if you do!)

Asset Guides:
*Is It Legal to Use Unreal Engine Assets in Unity or Godot and Vice Versa:*
https://gamefromscratch.com/using-asset-store-assets-in-other-engines-is-it-legal/

*Unreal to Godot, Blender or Unity:*
https://gamefromscratch.com/exporting-from-unreal-engine-to-godot-unity-or-blender/

*Moving From and To Unity in Minutes*
https://gamefromscratch.com/moving-from-and-to-the-unity-game-engine

(More guides in the linked article above!)

The above links contain a code that enable you to direct a portion of your purchase to support GFS (and thanks so much if you do!).