Feather Icons - Simply beautiful open source icons
Christmas Design Assets by Iconfinder - Sprinkle up your seasonal content with these festive goodies.
Christmas HQ - Totally free holiday icons, images, borders and fonts
Creative Market - Buy and sell handcrafted, mousemade design content like vector patterns, icons, photoshop brushes, fonts and more at Creative Market.
Animated Icons from Icons8 - Massive collection of full-motion animated icons to make your project shine
Vivid JS - A highly customizable, open source SVG icons library