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.
Wpisy
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/