Keybase Chat - End-to-end encrypted chat built into Keybase
Listenbox - Podcasts from audio & video on the web
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
Audioship - Upload audio to YouTube or Facebook
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
TunesToTube - What does TunesToTube do?