-- meta search engine that searches the internet for free public
sources. Also offers free icons, fonts, website templates, and more.
- Free Stock Photos.biz
-- free stock photos and clip art in a variety of commercial and
editorial licenses, including public domain, creative commons, and
- Morguefile -- "free images for creatives, by creatives"
- Pixabay -- public domain images licensed under Creative Commons
- Pixnio -- "free images for anyone and any use"