Commons:Free media resources/Free content search engines

From Wikimedia Commons, the free media repository

• Creative Commons Search - Official search of Creative Commons work.
• Common content - Directory of Creative Commons licensed content.
• Google Advanced Search (Usage Rights) Searches works under Creative Commons licenses.
• Yahoo Creative Commons Search - Search Creative Commons licensed work.
• Yotophoto - already indexes Wikipedia, so be careful to avoid duplication and also CC-NC/ND images, which cannot be uploaded to the Commons.
• http://opensourcegis.org/ - an index of open source/free GIS-related software. Licenses such as GPL and LGPL are allowed here.
• Flickr: Creative Commons - Click the "see more" links for each license. Then search further within images with that particular license.
• Flickr: Advanced Search - See the Creative Commons search options at the bottom.