LITA listerv has an useful discussion on stock photos:

eturner@gcls.org:

free stock images under Creative Commons licenses we like to use:

https://www.pexels.com/
https://stocksnap.io/
https://unsplash.com/

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Junior Tidal <jtidal@CityTech.Cuny.Edu>

NYPL also has a public domain collection – http://www.nypl.org/research/collections/digital-collections/public-domain

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John Blyberg <john@blyberg.net>
https://github.com/heyalexej/awesome-images

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Lisa Bunker <Lisa.Bunker@pima.gov>

sample searches to see if they have good images for you.  http://www.thinkstockphotos.com/

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Mark Beatty <mbeatty@ala.org>
https://search.creativecommons.org/

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Corey Seeman <cseeman@umich.edu>

Flickr users have a large number of items that are available under Creative Commons:

https://www.flickr.com/creativecommons/

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For Social Media and Presentations: Free Image Sources

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yvonner@ranchomiragelibrary.org:

Dollar Photo for stock images. They are closing down as of April 15^th. Does anyone use another vendor that comparable? We loved that fact that we could prepay for credits ($1 per image) rather than pay for a monthly subscription.

More on free images in this IMS blog:

https://blog.stcloudstate.edu/ims/?s=free+image&submit=Search