A beautifully curated collection of public domain art (images, books, film, audio) that is searchable by type, time period, or keywords.
Beautiful stock photos, all CC-0. Modify, copy, and distribute the photos however you want.
Tons of modern CC-BY icons! Search by keyword, and then choose the file type (.png, .psd, .svg, .eps) and the size. An incredible collection that will cover most of your icon needs.
The search interface of images, sound clips, and videos is super slick. Most content is generally free to use, but for commercial use you should check out their guidelines.
A wonderful directory of public domain images and illustrations. There is a good search function, and even web-based tools for creating and editing SVG files.
A searchable index (by keyword, by license, and orientation!) of photos and illustrations in the public domain and under Creative Commons
A great collection of vector art – and you can modify it online before downloading!. Some art is not CC, but the majority of it is. Downloads include .jpg, .ai, .pdf, and .eps).
Tons of images in the public domain that are searchable. You can pay for premium downloads.
All the clip art here is released to the public domain for a frictionless experience! https://openclipart.org/ “All Clipart are Released into the Public Domain. Each artist at Openclipart releases all rights to the images they share at Openclipart. The reason is so that there is no friction in using and sharing images authors make available…
A small collection of 2000 stock photos. The organization is a little peculiar, but the photos are very good.
A great site with resources for designers (icons, photos, stock images, etc.). There is a freemium model, and you can pay for access to more content, but there are thousands of open assets here. http://www.freepik.com/ “Freepik offers users, high quality graphic designs: exclusive illustrations and graphic resources carefully selected by our design team in order…
Clip art, photos, and illustrations that are all released under Creative Commons 0! http://www.pixabay.com/ “All images on Pixabay are released into the Public Domain under Creative Commons CC0. Therefore, the images can be modified and may be used freely for any application – also commercially and in printed format. Attribution in appreciated, but not required.”
One of the best places to go online for professional grade, CC0 images.
A nice repository for game art, game music, and game sound effects. This site features a filter by Creative Commons license, too! http://opengameart.org/