Seald - Keep your conversations secure, everywhere.
Bazoocam - Bazoocam is a popular chat website that rapidly connects you with strangers to chat.
Keybase Chat - End-to-end encrypted chat built into Keybase
FriendZone - Make new friends based on your interests and hobbies
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Quack - Quack – Meet real friends with the same interest app provides features to help users in viewing profiles of trusted people to make new friends by viewing profiles of their existing friends.