
Are you looking for images to use in your PowerPoint presentation, lecture, or research paper? There are many resources available that provide images and/or figures for use without needing permission from the author(s). Be sure to read the license information listed at each resource and, as always, credit the author!
Image source: Jeffrey Beall, Search!, (CC BY-ND 2.0)
Cover Browser: view 450,000+ covers of comics, books & more
everystockphoto: a search engine for free photos; this site requires you to sign-up for a free account to download photos
IconArchive: archive of icons to download with multiple usage options. Be sure to read the license information.
Internet Archive: a non-profit library of millions of free books, movies, software, music, websites, and more
Public Domain Photos: 5,000+ images
Stocksnap: provides images that are free to use with no attribution required
Unsplash: provides images that are entirely free to use however you want, including commercially
Vintage Ad Browser: collection of vintage ads from a variety of sources, including comic books, CD-Roms, websites, APIs, your submissions, book, magazine & comic book scans, and more
Wikimedia Commons: almost 11.5 million images available
Medical Image Resources
Gray's Anatomy plates from Wikimedia Commons
HEAL (Health Education Assets Library)
National Biomedical Imaging Archive (NBIA):
Public Health Image Library (PHIL)