Other sugars for cider/mead?

[melkor]

Has anyone experimented with other fermentable sugars (other than table sugar or I guess honey) for cider/wine recipes?
I am thinking of:
Dextrose, Glucose, or Lactose
Dry Malt Extract (or Liquid)
Agave Syrup
Maple Syrup
Brown Sugar (or sugar [saccharose] and molasses I think)
etc
etc
Any other interesting sources of sugar that you guys/gals have tried?
I am thinking of trying DME in a cider (I make beer so I have a cup or so to spare) to make it a little malty.