Tweedle App - Notion is nice but sometimes all you need is an app like Tweedle.
Metastream - Watch streaming media with friends
Plume - App for writing documents, scripts, books and more.
Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
Flamingo for Twitter - Flamingo for Twitter is a bright and colorful Twitter client that comes with a simple interface.
Kosmi - Digital Hangouts Reinvented