Mixxx can mix modules, though needs to be compiled with modplug=1 in the scons arguments. AUR mixxx-git and Fedora RPM Fusion packages at least have that enabled.
There's also Chipdisco, in Java, but mono (one channel for preview, one for live).
- https://echolevel.co.uk/post/1486312636973-Chipdisco
Some links to module repos and a download script:
- https://gist.github.com/milkmiruku/32a9d023c3e05fdb41c4dc8a9...