Chadder - Encrypted messaging app
Telbee.io - telbee adds voice messaging to podcasts, websites, social media and email to easily hear from and build human relationships with your customers and community - save time, reduce frustration, and gain sales, understanding and fans
GrapheneOS - GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.
Echo - Golang HTTP server framework
Earlynote - A time-travelling messaging app
Yac - Take your time back from Zoom & Slack