Scrimba - Interactive coding screencasts created in an instant
RecordScreen.io - Record screen right from browser. No installation required.
Vidrio - Holographic screencasting app for Mac. Free for COVID-19
Claquette - Seamlessly record your Mac's screen, microphone and camera
GoRails - Ruby on Rails screencasts for Web Developers
ViewedIt - Record your screen, share & know instantly when people watch