Sketch Talk - A community for Sketch users of all skill levels
Vidrio - Holographic screencasting app for Mac. Free for COVID-19
Sketch 101 by Designlab - Learn Sketch in this free course w/ downloadable templates
Scrimba - Interactive coding screencasts created in an instant
RookieUp Career Bootcamps - Tools to help designers build great portfolios and get jobs.
GoRails - Ruby on Rails screencasts for Web Developers