Virtual DJ 6.0 (released around 2008–2010) was a major version of Atomix Productions’ flagship DJ mixing software. It introduced:
This document gives an overview of Virtual DJ 6.0 (often referred to in the community as “NS Virtual DJ 6.0”), its main features, system requirements for Windows 7, the legal ways to obtain it, and the risks associated with seeking “free‑download” or “cracked” copies from unofficial sources.
Even if a download seems to work, you cannot update it, and you risk having your personal data stolen.
Any site claiming to offer it is likely illegal or dangerous.