Two updates to the list in the original post:
the BLP2PNG converter has been marked obsolete by its author. The author of that tool refers to the "BLPNG Converter" tool which can be found here:
https://www.wowinterface.com/downloa...Converter.html
The web tool to turn lua scripts into downloadable addons,
http://addon.ziuo.net/, no longer works. There's a similar tool that does the same (if it isn't actually the same tool) on
http://addon.bool.no/.