Generally, when I’m looking for blog post art I search Flickr first (check the Creative Commons “commercial use” box) and Google next (select “usage rights:free to use or share, even commercially”).
If they don’t have what I need, here are some other sites I check. I also like to skim them occasionally just for fun.
- Wikimedia Commons
- Deviant Art Creative Commons
- Im Creator
- Jay Mantri
- MorgueFile
- Public Domain
- Stock Media
- Stockvault
- Stock Pic
- SuperFamous
- Unrestricted Stock
- EveryStockPhoto
- FreeDigitalPhotos.net
- Free Images
- Free PIx
- LifeofPix
- Plus! Image
- shutterstock
- Stock.XCHNG
- U.S. Government Images
- Death to Stock
- Magdeleine.co
- PicJumbo
- Picography
- Pixabay
- Unsplash
- Gratisography
- Pexels
- Splitshire