Simply an app that acts as remote for xbmx/Kodi Open Source Home Theatre Software.
I run an installation of OpenELEC with Kodi 14 on my Raspberry Pi B+, and it works pretty good.
The app works flawless as a remote to Kodi. It adapts to what’s playing etc. I got a real remote as well, but this being an app can just do things a real remote can’t. It’s a pretty good extra.
It got pretty good widgets too, but I haven’t used those so much yet.
And, with Yatse Notification Plugin installed on your phone you can get it to show notifications from your phone on your Kodi. I tried and it’s pretty cool, got a little notification box when I got a new mail.