In this thread it says:
Did they confirm it or did they cancel those plans? I didn't see any mention of StarTools in the official patch notes.· StarTools
- We’re making our internal art tools available to the public.
- StarTools is a set of plugins for Discreet®'s 3ds max®, these tools allow advanced users to create, modify, and quickly preview models and animations, including particle and ribbon effects, that can be used in StarCraft II custom maps.