What is OpenGameArt.org?
[OpenGameArt.org] is a website with royalty free assets for game development, including 2D graphics (sprites, backgrounds, fonts, cursors, icons), 3D graphics (models, textures), and audio (music, sound effects).
Works that users upload to OpenGameArt are available under various licenses, but mainly Creative Commons and a custom OpenGameArt license that is very similar to Creative Commons.