Tag&Rename [1], a still maintained Windows-only shareware excellent at tagging music. Occasional use, Linux equivalents suck in various ways, it's perfectly configured to my needs, and works perfectly in Wine so why change it :)
EDIT: thanks for the Linux alternative suggestions everyone! I have (had) mostly the same complaints about ExFalso / Puddletag / EasyTAG as the ones I posted below about Picard (never tried Beets though). But most importantly, given this olde windows tool has been working fantastic for years, I don't see any reason to migrate my config and trust and habits :)
[1] http://www.softpointer.com/tr.htm
EDIT: thanks for the Linux alternative suggestions everyone! I have (had) mostly the same complaints about ExFalso / Puddletag / EasyTAG as the ones I posted below about Picard (never tried Beets though). But most importantly, given this olde windows tool has been working fantastic for years, I don't see any reason to migrate my config and trust and habits :)