Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Keybase Chat - End-to-end encrypted chat built into Keybase
Heartbeat - Listen to music with your friends together, on Spotify
Crypho - End-to-end-encrypted messaging and file sharing
Magic Playlist - Get the playlist of your dreams based on a song