Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
BotList - An app store for bots
Keybase Chat - End-to-end encrypted chat built into Keybase
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.
Crypho - End-to-end-encrypted messaging and file sharing
ChatBottle - Chatbots Search Engine