Hodgdon also makes Triple Seven, one of the family of sulfurless black powder substitutes. Triple Seven and Black Mag3 are more energetic than black powder, and produce higher velocities and pressures. Still burning carbon, the carbon-based fuel burned here is from the sugar family, not from charcoal.

Western Powders Company introduced Blackhorn 209 in 2008. Like other substitutes, it is made to be a volumetric substitute of black powder. It is dispensed in "black powder powder measures" for muzzleloading applications. Blackhorn 209 is an essentially non-corrosive, low-fouling, very consistent in gas generation, and non-hygroscopic

The whole article:
http://en.wikipedia.org/wiki/Black_powder_substitute