Chadder - Encrypted messaging app
HawkPost - Submit your content securely
GrapheneOS - GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.
FusionAuth - FusionAuth is a CIAM platform that is 100% free for unlimited users.
Earlynote - A time-travelling messaging app
Crypho - End-to-end-encrypted messaging and file sharing