RecordScreen.io - Record screen right from browser. No installation required.
Flarum - Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
Pairagraph - Clubhouse for the written word
ViewedIt - Record your screen, share & know instantly when people watch
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.