Did you ever...
- Crash a craft while landing and it fell apart into many many pieces
- Land on water but your craft tipped over and again fell apart into many tiny pieces
... and you didn't want to recover them all one by one ?
Or...
- Want to destroy all your debris in space but didn't want to bother ?
KerboKatz got the solution to all your troubles/problems. 
Proudly presenting you RecoverAll/DestroyAll. A plugin which lets you recover/Destroy all your vessels with just one click.
Don't worry about recovering/destroying all the tiny parts of your craft after a failed landing.
Or about having to destroy all your booster stages one by one.
Using:
KerboKatzUtilities (included in the downloads)