SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Youtube-DJ - Mix YouTube songs together
keezy - A colorful soundboard. Play with music.
Edjing - Discover edjing and edjing Pro, the most powerful DJ apps for music lovers! Mix on Android, Windows and iOS devices and record then share your DJ sets!
Splice - Music creation, collaboration, and sharing made simple.
Pacemaker - Create and share mixtapes with friends