Modding and creating add-ons for WoW have never been easier, especially with the release of AddOn Studio for World of Warcraft. AddOn Studio is a set of streamlined tools specifically tailored for creating all sorts of WoW applets and mods with Microsoft's Visual Studio:

AddOn Studio for World of Warcraft is an open-source development tool aimed to bring the Visual Studio experience to building World of Warcraft addons. This is the first release of the project and we have lots more ideas around how we can better improve addon development in the future...

AddOn Studio include the following key features in its first release: Visual Design Surface, Code Editor, FrameXML IntelliSense, Auto-Generate Table of Contents, Auto-Generate Events and more.

If you are an avid modder, or just starting, head over to CodePlex and get this must-have free release!