Youtube-DJ - Mix YouTube songs together
SoundBetter - Marketplace for musicians and music production professionals
YOU.DJ - Mix SoundCloud music and Youtube videos live in your browser.
PrimoMusic - An iTunes alternative made to manage iPhone/iPod media files
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!
RecordGram - A studio and production marketplace in the palm of your hand