Notes take from WPExplorer artical by Sourav K
Free royalty-free stock images and icons.
stock.xchange over 400,000 high resolution photos.
FreeDigitalPhotos offers free small resolution stock images.
StockVault has a excellent UI which makes easy to use.
Conceptual Collections, A limited number of free images, but useful with 6 categories – Business, Office, Computers, City, Industrial, Environment.
Sunipix Free stock-photo website neatly categorized images.
Photogen Free stock photo website.
OpenPhoto offers a variety watermarked images.
FreeStockPhotos Free stock photos websites and has a large number of links to other stock photo websites.
MorgueFile Free stock images.
Pixabay Free High quality images in hi-res sizes.
Flat Icons look neat, minimalistic and are small in size. Free icon websites:
Icon Finder Free icon packs from various design companies.
Find Icons Free icons and icon sets and premium.
DryIcons Offers complete set of coordinated icons.
Icon Archive Almost half a million icons to choose from
Iconspedia is another great icons resource.
Iconmonstr Free black and white icons in various sizes.
Icons DB Great icons you can search by color palette.
PSDExplorer Free psd resources from around the web.
ShutterStock – A lot of stock photo companies release a weekly freebie via their newsletter. Checking out the weekly freebie blog and signing up for the newsletter of reputed stock photo companies like ShutterStock, iStockPhoto, and Creative Market.
CompFight A WordPress Plugin that searches for images from Flickr and inserts them in your post with the proper license information.
For more information adn details abut this list viset: