Christmas Design Assets by Iconfinder - Sprinkle up your seasonal content with these festive goodies.
Ouch! Illustrations by Icons8 - Professional, perfectly matching, and customizable illustrations for any designs
Creative Market - Buy and sell handcrafted, mousemade design content like vector patterns, icons, photoshop brushes, fonts and more at Creative Market.
Control Illustrations - 108 free flat illustrations with customizable characters
Christmas HQ - Totally free holiday icons, images, borders and fonts
Humaaans - Mix-&-match illustrations of humans with a design library.