Don't know about "cool" but I always end up going back to opengameart.org While most of the stuff is one off assets that do not fit together there are also som

Don't know about "cool" but I always end up going back to opengameart.org While most of the stuff is one off assets that do not fit together there are also some nice sets by some creators such as Kenney or Emcee Flesher Also the Liberated Pixel Cup (LPC) stuff is pretty nice. Mind you I mostly just look for 2D assets. https://opengameart.org/users/kenney https://opengameart.org/users/kenney https://opengameart.org/users/emcee-flesher https://opengameart.org/users/emcee-flesher https://opengameart.org/content/lpc-collection https://opengameart.org/content/lpc-collection