- Command Explorer
Provides a tool window to explorer all commands, groups and menus to help extension authors place commands/buttons in the desired location. By Mads Kristensen, Visual Studio Marketplace. - VSCT IntelliSense
Gives IntelliSense for .vsct files used by Visual Studio extension authors. By Mads Kristensen, Visual Studio Marketplace. - Extensibility Tools
Contains numerous tools and helpers that makes it easier than ever to build Visual Studio extensions. By Mads Kristensen, Visual Studio Marketplace. - Visual Studio Extension Analyzer (Visual Studio 2010)
Extension Analyzer helps debug issues with VSIX Compoments, Visual Studio Packages, PkgDef Files and MEF Components. It also provides an aggregated view of log and trace information for Visual Studio.