Flaticon - A database of free vector icons.
Wallhaven - Your source for the best high quality wallpapers on the Net!
Font Awesome - Font Awesome makes it easy to add vector icons and social logos to your website. And version 5 is redesigned and built from the ground up!
InterfaceLIFT - High-resolution widescreen wallpapers, desktop icons, and themes for Mac OS X, Microsoft Windows...
IconArchive - Search through more than 735,000 free icons. Browse icons by category, artist, popularity, date. Organize and share your favorites.
Picky Wallpapers - Picky Wallpapers is a good website that has the selection of HD quality wallpapers only.