pixabay.com
Motto: "Alle Bilder und Videos auf Pixabay sind frei von Urheberrechten unter Creative Commons CC0 veröffentlicht. Du kannst diese kostenlos herunterladen, verändern und für beliebige Zwecke verwenden, auch in kommerziellen Anwendungen. Eine Namensnennung ist nicht erforderlich..."

  pexels.com
"It's hard to understand complex licenses that is why all photos on Pexels are licensed under the Creative Commons Zero (CC0) license."

  stocksnap.io
"All photos on StockSnap fall under the Creative Commons CC0 license. That means you can copy, modify, distribute any photo on the site, even for commercial purposes, all without asking permission!"

  gratisography.com
"Free high-resolution pictures you can use on your personal and commercial projects, free of copyright restrictions."

  visualhunt.com
"We hunt free high quality stock photos."

  librestock.com
Bilder-Suchmaschine: "search the best ,,, free stock photo websites in one place"

  isorepublic.com
"Thousands of High.Resolution CC0 Licensed Images for Your Next Creative Project"

  negativespace.co
"Beautiful, High-Resolution Free Stock Photos - For personal or commercial use, all of our CCo licensed images are completely free to use!"

  freenaturestock.com
"Royalty-free Nature Stock Photos. Use them however you want"