Below is a list of sites where you can get free assets for your games
Please do check the license that they come with as some may need credit in the app/game that uses them
3D Models
Kenney
Quaternius
Kay Lousberg Art Packs
DevAssets powered by Brackeys
Render People
Maximo
Poly Haven
2D Graphics
Kenney
Game Icons
Textures
@EricMatyas
cc0textures
HDRI Haven
HDRIs β’ Poly Haven (convert with HDRI to CubeMap)