Unity Part Tools
From Kerbal Space Program Wiki
Newest PartTool can be found in this forum thread: http://forum.kerbalspaceprogram.com/showthread.php/34013-0-20-PartTools-GameDatabase-and-new-features
Newest PartTool can be found in this forum thread: http://forum.kerbalspaceprogram.com/showthread.php/34013-0-20-PartTools-GameDatabase-and-new-features