Burst (Mix of Creative Commons 0 (zero) License: public domain and Licensed photos. Check that you are using the creative commons photos and not the licensed ones.)
Designers Pics (Photos free for personal or commercial use. Collection of stock photos.)
Disabled and Here collection - In the words of the site "This is a disability-led effort to provide free & inclusive stock images from our own perspective, with photos and illustrations celebrating disabled Black, Indigenous, people of color (BIPOC).
Fancycrave (A collection of free high quality travel photos. Attribution is greatly appreciated. For more information see their about page.)
Flaticon Free Vector Icons (Attribution required. Must attribute with "Designed by {authors name} from Flaticon".)
Foodies Feed (A collection of free food photos. Free personal and commercial use. Check the license terms attached to each photo for more information.)
FreeImages (Free for personal and commercial use. US based images. Free to use under their open licence. Avoid istock photos on same pages.)
freepik (Free for non-commercial online use. Credit must be provided to FreePik. Free collection of vector images, PSD (Adobe Photoshop), icons and photos.)
Gender Spectrum Collection (The Gender Spectrum Collection is a stock photo library featuring images of trans and non-binary models that go beyond the clichés. This collection aims to help media better represent members of these communities as people not necessarily defined by their gender identities—people with careers, relationships, talents, passions, and home lives. Read Guidelines and Creative Commons license.)
GoodFreePhotos.com (US based photography. Most photos licensed under the CC0 / Public Domain License. Attribution not required but appreciated. Avoid Shutterstock sponsored photos in right hand corner)
Jeshoots (Free for personal and commercial use under Jeshoots licence or Creative Commons 0 (Zero) licence. Attribution not required.)
Life of Pix (Creative Commons 0 (zero) License: public domain. Collection of high resolution photos.)
Magdeleine (Creative commons zero. Collection of high resolution photos, attribution preferred but not required.)
Morguefile (Attribution required. Free images for creatives, by creatives. A post production file, over 350,000 free stock photos for commercial use.)
Negative Space (Creative Commons 0 (zero) License: public domain. Free stock photos added every week.)
New old stock (Free of known copyright restrictions. Vintage photos from the public archives.)
Pexels (Allows for use without attribution and for commercial purposes. Used under Pexels open licence. Avoid photos with watermarks as these are NOT openly licensed. Good range and search function)
https://pxhere.com/ (All images Creative commons zero. The licence information states "It's hard to understand complex licenses that is why all photos on PxHere are licensed under the Creative Commons Zero (CC0) license. This means the pictures are completely free to be used for any legal purpose. The pictures are free for personal and even for commercial use. You can modify, copy and distribute the photos. All without asking for permission or setting a link to the source. So, attribution is not required.")
Pixabay (Allows for use without attribution and for commercial purposes. Used under Pixabay open licence. Avoid photos with watermarks as these are NOT openly licensed. Good range and search function.)
Pixnio (Site in German. Allows for use without attribution for commercial purposes. Used under Pixnio open licence. Avoid photos from istock that also advertised on the site.)
Public domain archive (Creative commons zero. Collection of high resolution photos.)
Public Domain Pictures (Creative commons zero with some paid photos. Make sure you only use the creative commons photos.)
Realistic Shots (Creative commons zero. Collection of high resolution photos.)
Startup Stock Photos (Creative Commons 0 (zero) License: public domain. Images related to business and startups.)
Stocksnap (Creative Commons 0 (zero) License: public domain. Hundreds of high resolution images added weekly.)
Stockvault (Mix of Non-Commercial, Commercial and Public Domain CC0. A gallery of thousands of free public domain photos. It offers textures and illustrations to community members.)
Travel Coffee Book (Creative Commons 0 (zero) License: public domain. High quality travel photos.)
USAid Agency for Economic Development. (Flickr photostream. Images highlighting developing nations. Licence conditions for each image may differ and must be followed.)
Wikimedia Commons (Free content: see copyright & licensing supplied with each image. A database of 30 million media files.)
World Obesity Image Bank - Combating weight bias in the media. Positive images of people who have a range of body sizes. (Images are free to use but must credit the World Obesity Federation upon use and Agree to the Terms of Use.)