Hermes - Pandora Client for OS X
Slackmojis - A directory of the best custom slack emojis
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
Discord Emoji - Iconfinder, but for emoji.
Keybase Chat - End-to-end encrypted chat built into Keybase
Emoji Builder - Create your own emoji in no time 💨