PPT Productivity's Multiply Shapes feature lets you duplicate selected shapes into multiple shapes in PowerPoint.

You can specify how many copies of the shape to add - shapes will be inserted to your PowerPoint slide in multiple rows and columns. For example, add a person icon to your PowerPoint slide then multiply it to 10 or 100 people, to represent data sets. If you have text in the selected shape you can choose to either include or exclude it from the multiplied shapes.