Proof.ink - Proven immutable data stored on the Steem blockchain
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Quick Freeze - Move faster by skipping the setup and management of local databases and direct integrations.
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