It was announced on the Wouxun yahoo group list that the KC8UNJ Commander software now has a version for wouxun KG-UV[123]
This is free software, but not open source, and is windows only. Someone mentioned it's implemented in Visual basic, which I don't know if that's correct or not.
I mention it here as a somewhat mild FYI. KC8UNJ's commander software is available for radios from Yaesu, ICom, and now Wouxun. However, there are separate packages for each radio, and per radio specific formats. At least according to the read-me even the csv is considered radio specific. It does support importing/exporting the .tw files that the wouxun supplied software uses.
I don't know if there is anything useful to learn from the software. I was hoping it might have something to learn from in terms of cross radio file format, but that doesn't appear to be the case. As far as I've seen Chirp seems to be leading the way.
--Rob