Best plugins for Maya?

I often use voronoi scripts for creating debris and other effects.

http://www.creativecrash.com/maya/plugin/larmorvoronoi-plugin-for-maya-2012-2013-2014

What are you looking to create?

The only real custom plugin I use is the Nightshade UV Editor - love it for doing UV editing!
http://www.creativecrash.com/maya/script/nightshade-uv-editor

Other than that, it's just display / color settings that I changed, but I'm not doing anything ultra fancy.

Hey Maya lovers - any suggestions from your side? :)

I'd like to know that as well :) For a bit different reason than using them, but would be very interesting to learn about the ones you like.