Lista de sites de imagens e fotos free

Onde conseguir imagens e fotos gratuitas para compor layouts?
Uma lista com vários sites com fotos free.

http://www.sxc.hu/
http://www.public-domain-photos.com/
http://www.morguefile.com/
http://www.freedigitalphotos.net/
http://www.imageafter.com/
http://www.photogen.com/
http://www.burningwell.org/
http://www.openphoto.net/
http://imagebase.davidniblack.com/main.php
http://www.stockvault.net/
http://www.freepixels.com/
http://www.everystockphoto.com/
http://www.unprofound.com/
http://www.woophy.com/photo
http://www.quick-image.com/index.cfm?/home_ES&activate=home
http://www.photocase.com/de/
http://www.nextfoto.com.br/novo/index.asp
http://www.latinstock.com.br/br/homenet/Default.aspx