Examples

[Endarren]

I just started using WoW UI Designer and I was wondering what addons were made with it? The reason I am asking is to get an example of a functional addon that I can use as a guide on how to use the designer.

[Bobtehbuildr]

I use it to create BobsToolbox but I'm looking for another editor. This editor hasn't been updated in a very long time and it would be nice to not have to deal with the bugs. It doesn't appear they are going to start working on the project again.

[Ketho]

WoW UI Designer is imho the best choice if you want to create "frames" in XML, instead of "pure" Lua
-- Don't ever try AddOn Studio, it's horribly outdated

There also is a non-WoW IDE you could give a try: IntelliJ IDEA
It supports Lua (and the plugin is made by the author of Prat 3.0)

Otherwise just use Notepad++ or Notepad2, etc

I don't believe addons are different according to the IDE / Text Editor,
.. but to the author and the framework/libraries (e.g. Ace3) and use of either Lua/XML for frames