eJay is a series of musical arrangement software, and video games, primarily for Microsoft Windows. The first edition, Dance eJay, was released in 1997. It supports eight tracks of audio and, as with its successors, permits the arrangement of sound bites by a drag-and-drop interface. Since the original Dance eJay, there have been many releases catering to different music genres and users, including techno and hip-hop, as well as a PlayStation 2 edition called eJay Clubworld.
https://en.wikipedia.org/wiki/EJay