negativespace
Beautiful, High-Resolution Free Stock Photos
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mmtstock
Free photos for commercial use
StockSnap
Beautiful free stock photos
papers
Wallpapers Every Hour!Hand collected :)
skitterphoto
a place to find, show and share public domain photos
myphotopack
A free photo pack just for you. Every month.
pixabay
可在任何地方使用的免费图片和视频
visualhunt
100% Free High Quality Photos
albumarium
The best place to find & share beautiful images