rekordbox
DJ software for library management and performance from Pioneer DJ
Freemium
Audio
It analyzes tracks for beats and key, and sets cue points and playlists. Prepared libraries move to Pioneer DJ players by USB. Newer versions add stem separation and cloud sync.
Basic features are free, and paid plans unlock performance and cloud features.
Serato DJ and Traktor are alternatives. rekordbox suits DJs who play on club standard gear.