Flowkit - Sketch library for user flows/content maps/annotations
Upcado - Super easy to use Messenger Marketing tool for your business
Eva Design System - A free customizable design system
Job Promotion Course - Step-by-step promotion guide in a free 7-day email course
Sketch 101 by Designlab - Learn Sketch in this free course w/ downloadable templates
Email University - A free course to help you become a better marketer