Backdrops - The only wallpapers you'll ever need. Say hello to Backdrops.
keezy - A colorful soundboard. Play with music.
WallpapersCraft - HD & 4K wallpapers
Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.
Pitch Black Wallpaper - Pitch Black Wallpaper is an application, allowing you to set the pitch-black wallpaper to your smartphone or tablet.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.