Best Plug-Ins & Extensions for Photoshop?

I suggest Eye candy plugin
https://exposure.software/eyecandy/
eye Candy helps you quickly explore and design looks. In Eye Candy 7, effects are chosen through easy to recognize icons rather than text menus. Presets are rapidly previewed by simply mousing over them. The theme is less clicking and more visual browsing.

Chrome effect , Dripping, Blood effect icicles etc.. with one click I am in love with that plugin