FusionAuth - FusionAuth is a CIAM platform that is 100% free for unlimited users.
Wire by EY - A highly secured collaboration platform
HawkPost - Submit your content securely
Crypho - End-to-end-encrypted messaging and file sharing
GrapheneOS - GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.
blockslack.io - Chat for small teams — encrypted and decentralized