If you’re into making plugins for WoW, you’ll want to check this out:
I saw this on Visual Studio’s RSS feed. It’s quite an extensive add-on that turns your IDE into a WoW form editor and Lua script language editor. It even has syntax highlighting! Not only that, this thing does code generation just like Visual Studio – you can auto-generate Lua events, insert code snippets, and auto-generate the TOC file based on what files are in your project.