The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Motile Media:
Play and control your music without looking at the screen or pressing any buttons. Just lean to play, pause, go to the next song or previous song. LeanTunes lets you play and control your music library simply by leaning your iPhone/iPod Touch to the left , right , up or down to control playback. No need to look at your screen for control buttons.Lean Left : PlayLean Right : PauseLean Up : Next SongLean Down : Previous SongIt's that simple to use !You can even set the screen to go blank after a time you want, saving power. Even when the screen is blank, you can still lean to control your music.LeanTunes is fully compatible with your built-in iPod app, so you can switch back and forth between LeanTunes and other apps while still playing your music. Since LeanTunes uses your built-in iPod app, you don't have to create new playlists, just use the playlist you already have.Lean up and the next song is played. If you keep it there it automatically keeps skipping to the next song. The time that each song is played can be adjusted too.Double tap on the screen and you can temporarily disable the lean controls. Double tap again to enable them again.