TisaneAPI - Detect hate speech, cyberbullying, and more in 27 languages
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
YouTube Kids - YouTube for the youngins on iOS and Android
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Kidslox - Set boundaries for your kids
Keybase Chat - End-to-end encrypted chat built into Keybase