Flip Fluids

The FLIP Fluids addon is a tool that helps you set up, run, and render liquid simulation effects

Gaffer

A light-manager add-on for Blender with all the HDR's from HDRIHaven

Hard Ops and Boxcutter

The best tool for helping you with hard surface modeling.

Lily Surface Scraper

Import shaders end environments in Blender from a single URL