Ghostnote - Add notes to anything.
Yac - Take your time back from Zoom & Slack
Context Note - Context Note is a free chrome extension that help you take notes on the web with their context.
Beseda - Async video and audio messaging for remote teams
Page Pad - Page Pad is a productivity tool for creating notes on any particular web page you visit.
Slack - A messaging app for teams who see through the Earth!