Seald - Keep your conversations secure, everywhere.
Crypho - End-to-end-encrypted messaging and file sharing
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Zhoo - Super simple chat in your browser 💬
Hermes - Pandora Client for OS X
Keybase - Keybase will be a public directory of publicly auditable public keys.