Riot
Instant Messaging, IRC, Email Alternatives, Video & Voice

Riot is a secure collaboration app for group chat, file transfer and voice/video conferencing built on the decentralized Matrix ecosystem, providing bridges and integrations to centralized services such as IRC, Slack, Gitter, etc

Security Notes

End-to-end encryption is in beta on Web as of Nov 5th 2016, with other platforms following week of Nov 14th

Supported Protocols
SSL/TLS
Matrix