Slack Message Buttons - Making messages more interactive with buttons
Metastream - Watch streaming media with friends
Commandline Challenge - Test your command line skills
Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
Steward - Steward provides on-demand sales research and operations support.
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.