DataTip - The fastest way to store & access your critical datapoints.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
HeyForm - Paperless data collection with better data insights
Keybase Chat - End-to-end encrypted chat built into Keybase
Immutable.js - Immutable persistent data collections for Javascript which increase efficiency and simplicity. - immutable-js/immutable-js
Crypho - End-to-end-encrypted messaging and file sharing