My personal favorites:

Integral Designs Silponcho.
1) primary foul weather raingear.
2) tarp to sit under in a rainy camp
3) emergency bivy in my daybag
4) insulation "taco" under my hammock as a windblock/underquilt outer shell

AGG 3 cup pot:
1) pot
2) cup
3) bowl
4) Bathtub

1.5 foot square of blue foam

1) butt pad to sit on
2) stand on it pad to get out of hammock or stand on to bathe/dress etc.
3) pack lid, strapped on the top of my GG virga

alcohol stove fuel

1) stove fuel
2) hand sanitizer
3) (if everclear) makes decent peppermint schnapps when mixed with mint tea

Toque

1) keeps head warm
2) freezer bag/dehydrated food cozy for food