Stealthy: Secret Messenger - Chat anonymously with friends & strangers
HawkPost - Submit your content securely
Vuash - Send secret messages safely.
FusionAuth - FusionAuth is a CIAM platform that is 100% free for unlimited users.
Phonebot - Make phone calls from within a Slack channel
GrapheneOS - GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.