http://www.afrigadget.com/This site has photos and simple instructions on how to purify large amounts of water with chlorine, how to make a seed planter, how to roast nuts, how to build a food dryer, how to rig a shower, and much more. All of these things are made from found parts, and the site has a link to earlier posts at the bottom of each page.
As usual, get ideas and make them your own.