What it does
Lets you change the default orientation of the VAB so that your ships face east (or west) by default, rather than north.
Download from SpaceDock License: CC-BY-NC-SA 4.0 Source code
Includes per-game settings so that you can still pick north, if you like.
Why would anyone want this?
I always, always make my ships face eastward in the VAB. That's because I always launch east, and I like to do that by pitching down (using the navball for navigation