Slickr - Powerful cover image generator for your Hashnode blog
SocialSizes - Sketch templates for sharing images & videos on social media
Canva Pro - Millions of design assets, templates and images all in one
Video Templates By VEED.IO - Professional & editable online video templates for social
Figen - Free post cover & background generator tool
Social Templates Bundle for Instagram - Large bundle of 240 posts & stories templates for Instagram