Best Plug-Ins & Extensions for Photoshop?

The Topaz Collection is pretty solid for photoshop plugins. They range from various effects to filters and shortcuts.

true grit texture pack is really good, I love all of their assets, try to get one for photoshop and procreate if possible!

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

just search it, theres no plugin called best plugin