Rendering of 1 item?

Hello,
It has been a year since somebody told me about a free widget from the asset store that makes it so multiple objects get rendered with a single array of materials that get placed in the parent object (under 1 render). I recently checked the profiler to find out what was slowing down my game, and saw that it had to do with the amount of items that got rendered. Does anybody remember what program that was? It had the word ‘simple’ or ‘simplifier’ in it. Thank you.

Simple mesh combine

Thank you.