Where To find textures and sprites for Unity 3D?

I just swiched over from Game Maker to Unity 3D but i see they dont have any sprites or textures included. So where can i find high quility textures and sprites?

cgtextures.com has lots of textures under acceptable license. Give it a try.

www.cgtextures.com

You can also fish around @ www.opengameart.org