The document describes development tools available in Microsoft Dynamics AX 2012. It lists tools available from the Development Tools menu and Add-Ins menu, including the Application Objects tool to view application objects, the Code Profiler to analyze performance, the Debugger to debug X++ code, and the Table Browser to view and update table data. It provides descriptions of each tool's purpose. Some tools like the Code Explorer are no longer available and have been replaced by other tools like the Reverse Engineering tool.