Status: There is a branch which has most of these features implemented. Testing is still needed.
Mixxx has BPM detection but not beat detection. Beat detection would allow us to do man cool tricks including:
There is currently a branch at https://code.launchpad.net/~mixxxdevelopers/mixxx/features_trackbeats.
Currently it does:
Using beat markers to quantize cues, hotcues and loops is done by the branch features_beatcontrols; https://code.launchpad.net/~mixxxdevelopers/mixxx/features_beatcontrols.