Facebook Spaces - Facebook's social Virtual Reality platform is here!
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Slackmojis - A directory of the best custom slack emojis
Keybase Chat - End-to-end encrypted chat built into Keybase
Facebook Reactions - A more expressive Like button
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.