I just released my new WoW addon manager, Wootbit Client, today at
http://www.wootbit.com/. It has an embedded web browser so you can browse wowinterface.com, when you click a download link it automatically recognizes it and installs it into your WoW installation without any of that manual unzipping or copying. It should make wowinterface even more convenient.
Because it uses a web browser you are still directly using and supporting wowinterface when you use the tool.
Hope you find it useful. I certainly find wowinterface useful and I tested Wootbit Client extensively with wowinterface. If you have any questions/comments/feedback please feel free to let me know here or on
fb/
twitter.
We also posted the download on wowinterface.com itself
here