Please define the best photo shop plugin which we use for Graphic design?

BlendMe in is a plugin for both Photoshop and Illustrator. Search thousands of assets, including popular icon packs, without leaving Photoshop or Illustrator. Drag assets into your current composition and use them in the original format (layers, vector objects, adjustment layers and so on).

There are so many plugins. You can search from internet.

Graphic Design is a vast field and also Photoshop has a lot of plugins. But my favourite plugin is "3D Invigorator".