3D Systems

Earnings up 28%
Revenue up 25%

3D printing is no longer something out of sci-fi fantasies. Printers really are cranking out physical goods, from dental pieces to replacement parts. 3D Systems is one of the market leaders, and the stock has more than tripled in 2012 as investors warm up to the prospects.
Yes, the niche is still in its infancy. The printers are too slow, and they're too expensive. However, as they get faster and cheaper -- and they will -- 3D printing will become a more popular process for companies and even consumers.