The Pot-in-Pot is a very low tech, no electricity, no compressor, refrigerator. As the name implies it is made from two pots, one inside the other, and the gap filled with wet sand. The evaporation of water from the middle layer is the source of the cooling. Invented by Mohammed Bah Abba of Nigeria.
dead link: http://hinterlands.cc/index.php?showtopic=30
Complete instructions to make a small rocket fueled by a single paper match.
This is a camping stove made from aluminum cans and epoxy. The basic design works with most any soda or beer cans, but the specifics here are geared towards a 12oz Pepsi can and a 14.9oz Guinness can.
dead link: http://www.pcthiker.com/pages/gear/pepsiGstoveinstruct.shtml
This is a website that automates creating a personal handwriting font. When I did this twelve years ago, hand tracing letters with Adobe Illustrator, then importing them into Fontographer, it took me months of spare time. Now it is an online app, available for free.
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