deathtothestockphoto.com
DeathToTheStockPhoto is a free online service delivering high-resolution lifestyle photography to your inbox every month. It has got free and premium version.
negativespace.co
Negative Space offers up new free stock photos every week. All of its photos are shared without copyright restrictions.
pexels.com
Pexels provides high quality and completely free stock photos licensed under the Creative Commons Zero (CC0) license. All photos are nicely tagged, searchable and also easy to discover through our discover pages.
LINK: https://www.pexels.com/
freeimages.com
More than 18000 free digital photographic images for web, publishing, and design. Royalty and cost free stock photos. Free stock photographic library.
gograph.com
Gograph has got inexpensive royalty free stock photography, illustrations, and footage.
LINK: http://www.gograph.com/
gratisography.com
Free high-resolution pictures you can use on your personal and commercial projects. All pictures were photographed by Ryan McGuire and free of copyright restrictions.
findicons.com
Findicons built this service from scratch, including the icon database, the backend codes, the frontend design and even the mascots. You can search through 300000 free icons in more than 2000 icon packs.
LINK: http://findicons.com/