Clkr - crowd-sourced clipart, can make and share designs online
Creativity103 - abstract backgrounds, textures and design ideas
Flickr - photographs of various subjects which you can filter by Creative Commons licenses
Getty Images: Embed - enormous collection of news related photographs, free to embed
The Getty: Open Content Program - thousands of works of art from The Getty Museum
Gratisography - random, artistic photographs
HubbleSite - explore the universe with images from Hubble's eye
The Metropolitan Museum of Art - a vast archive of 400,000 images from this New York museum
NASA - NASA image galleries
PhotoEverywhere - geography, cities, landmarks
Pixabay - a vast library of public domain images
RIJKS Museum - images of public domain artwork from this museum in Amsterdam
Search by Creative Commons provides excellent explanations about what Creative Commons licenses are, and offers a way to search throughout the web for images that have them.
Pics 4 Learning is specifically designed for teachers and students, and has thousands of images that can be used freely.
Clip Art ETC from Florida’s Educational Technology Clearinghouse offers over 38,000 pieces of clip art for students and teachers.
Edupics is one more source of clip art for use in schools.
I’m also adding a direct link to Darren Draper’s excellent post (including additional resources) called The Educator’s Guide To The Creative Commons.
Here are more simple ways to search for Creative Commons images:.
Wikimedia Commons has four million images.
Free Digital Photos
Public Domain Photos is a photographers' domain for public display with categories.
Free Historical Stock Photos
100 (Legal) Sources for Free Stock Images
Free Clip Art by Phillip Martin
WP Clip Art
30 Websites To Download Free Stock Photos
Free Media Goo
Free Stock Photography
Finding and using public domain photographs
The Noun Project “collects, organizes and adds to the highly recognizable symbols that form the world’s visual language, so we may them in a fun and meaningful way.” It’s really quite an impressive collection.
4 Free Photos is another website that offers a good selection of public domain images
Here’s the main link to Yale Digital Commons.
Public Domain Pictures
PhotoPin is new search engine for Creative Commons images. It also gives you the exact attribution to copy and paste.
Musopen - royalty free music
PublicDomain4U - great historical music recordings free to play and share legally
YouTube Audio Library - music you can download to use in projects online and offline
Flashkit - offers more than 7,000 royalty-free music loops
Free-Loops - offers more than 7,000 musicians' loops, including many drum beats and various instruments
The Free Music Archive currently has 5,000 free tracks available for download.