The best site I've ever found for camp/hiking stoves is the Zen Stoves site. It's filled with plans for all kinds of stoves you can build - alcohol, wood, solar etc.
Over the years I've built several pop can alcohol hiking stoves and used them (plans taken from the Zen Stoves site). In the summer they work fine, but when it gets cold they don't want to light, and occasionally hauling fuel (leaks), and buying the right type of alcohol can be a pain. So I built a wood stove similar to Risk's Forge (plans at Zen Stoves), which works great on only a small amount of fuel. I also built a firebox similar to Nimblewill Nomad's Little Dandy Wood Stove - though mine is larger (plans also found at Zen Stoves) for when I wanted to cook with a larger frying pan or sauce pan.
I built both of my wood fire stoves with parts I salvaged from an old computer (the fan and the metal from the tower case)