Icons8 Developer API - 500k+ design assets, now available on-demand
Slickr - Powerful cover image generator for your Hashnode blog
Canva Pro - Millions of design assets, templates and images all in one
Pixelify - A new way to download and share free design assets
SocialSizes - Sketch templates for sharing images & videos on social media
Creative Market - Buy and sell handcrafted, mousemade design content like vector patterns, icons, photoshop brushes, fonts and more at Creative Market.