Twoo - With the millions of active and interesting people around the world, Twoo is one of the most interesting and practical means for finding the new people across the globe.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Path Talk - Smart, Private Messaging
Keybase Chat - End-to-end encrypted chat built into Keybase
BeeTalk - Our world is really full of strange and interesting people.
Crypho - End-to-end-encrypted messaging and file sharing