Adobe XD - Adobe XD is an all-in-one UX/UI solution for designing websites, mobile apps and more.
Christmas Design Assets by Iconfinder - Sprinkle up your seasonal content with these festive goodies.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Creative Market - Buy and sell handcrafted, mousemade design content like vector patterns, icons, photoshop brushes, fonts and more at Creative Market.
Sketch 42 - Now with export presets, touch bar integration, and more
Christmas HQ - Totally free holiday icons, images, borders and fonts