I am frustrated about how often I want to contribute to a story, game, or movie but can't because everything is copy-write. As an instructor I so often find that my students want to use a character but everything that is cool is copy-write. So.... I am building a totally open source, CC0, royalty free resource.
Everything is anonymous and free to use. I am just starting, but I have had a lot of positive feed-back.
Please contribute, but be aware. If you include the keyword BlueOwlRock, you kiss your copy-write good-bye.