amaroKontrol

Remote control for Amarok music player. You'll need to install script into Amarok before using (instructions in app's menu -> Help). Script is also available on: http://kde-apps.org/content/show.php?content=161189
(Based on, and backward compatibile with Amarok2 Remote script - You can safely remove old script)

Application features:
- remote controls (play/pause, skip to next/previous track, volume control)
- current playlist, collection browser
- ability to add/remove tracks to/from current playlist
- lyrics (only for 10" tablets)
- 3 types of notification
- download songs from PC to device
- optimized for smartphones, 7" and 10" tablets

Get source code here:
https://github.com/MatejVancik/amaroKontrol


For android <4.0, there's similar application called Amarok2 Remote, available on:
https://play.google.com/store/apps/details?id=org.h0lger.amarok2remote