Free, Decent Game Art Assets from Kenny
I have no idea how this guy does it! Kenny gives away free game art. Good game art! Seems like he relies on donations and sales of his easy 3D model creation tool Assetforge.
At the very least his tiles and sprite make great placeholders during development!
https://www.scirra.com/forum/kenney-s-free-assets-20-000-assets_t93518