Handwrytten - Handwritten notes straight from your device. Huge selection of cards or design your own. Handwriting service integrates with 1000's of apps.
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
Felt for iPhone - Handwritten cards for the modern world
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Inkpact - Send genuine handwritten messages in just a few clicks
Keybase Chat - End-to-end encrypted chat built into Keybase