Yac - Take your time back from Zoom & Slack
Gone - An ephemeral to-do list
Beseda - Async video and audio messaging for remote teams
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
SuperNormal - Async video updates for remote teams
Check - Check is a unit testing framework for C, which runs on environments such as GNU/Linux, GNU/Hurd, BSD, and Mac OSX.