I have 20-30 abc-related bits of software on my machine that I've looked at at various times (and though I use abc a lot, I use very few of them - abcm2ps by far the most, abc2midi/abcmidifier occasionally).

I have an old version of abcExplorer (1.1.0, from March 2008), which I rejected for use - I have the installer still, but it's not installed. It'll be interesting to see if it's become more useful.

Mick