Quad
In late 2012 we worked on a new group messaging app - it was a lot of fun, the branding we decided on was pretty playful and aimed at a younger audience. At the time it was our largest iOS app to date, covering aspects like video, photo, audio and social media sharing (importing Tweets and the likes into conversations). @Tom Graham worked up a Behance page for the project!
Here's some screnshots. If I used your avatar it's because you're beautiful.