Duplication Tool is a Blender add-on from Vinay-chikkam that creates copies with incremental names and materials. The developer describes it as a quality-of-life improvement for Blender 3D.
The add-on works through pie menus. Shift N opens a pie menu to save your file and works in Layout mode, while Ctrl Shift N duplicates a model along with its materials using pie options and works in the outliner. Version 1.0.2 added a parenting function so Ctrl Shift N/P behaves like Blender's own duplication, let users set their own shortcuts through Preferences > Add-ons > Duplication Tool, and fixed a material swapping issue.
Compatible with Blender 4.2 LTS and newer, Duplication Tool is licensed under the GNU General Public License v3.0 or later and requires no special permissions. A tutorial video is available on the developer's page.