What substitutes are available for sugar?
The following are sugar substitutes that are not considered "artificial sweetners."  The links provide interesting information that should be pondered before using any of them.


Agave nectar
Stevia
Honey
Maple syrup


For actual unrefined cane syrup or sugar (considered healthier than sugar by those who consider less refined to equal more healthy), look to 


Rapadura
Sucanat


For artificial sweeteners, you could consider:


Splenda (you can get this in quantities suitable for baking at most grocery stores)


If you're looking to lower your sugar, before going to artificial sweeteners don't discount just teaching yourself a lower sugar diet by eating smaller portions of sweets and making your own sweets with a lower sugar content.