VAB-SpacePlaneHanger Folders would be nice.

[libentho000]

Being able to make folders for stuff like "Planes" or "SSTOs" in space plane hanger and "To Jool" or "To mun" in VAB. Those were just examples, i just thing being able to categorize your ships would be very helpful.  

Edited February 14, 2020 by libentho000

[Corax]

Agreed on the VAB/SPH (and the save games!) needing a better way to organize them. Come to think of it, the screenshots are a mess, too, but that may need another topic.

However, I'd actually prefer tags over categories (or directories). If you put a design in say "spaceplane", you can't at the same time put it into "VTOL" as well as "amphibious". Tags can allow you to do that.

In the meantime, may I recommend katateochi's excellent Craft Manager mod?

[linuxgurugamer]

There is also this mod: