A utility that reads the data from magstripe cards and tells you what's on them.
From here you can purchase a DIY kit for a circuit that implements the German Enigma cypher from World War II. Fun for cypherpunks, electronics mavens, and geeks!
The website of someone who makes and sells replicas of famous movie props, such as the grail diary from the Indiana Jones movies and Marty's letter to Doc Brown in the second Back to the Future movie. Most impressive!
How to bind pages into books. Ideal for binding photocopies into new books.
RepRap is an open-source (hardware, software, and documentation) desktop fabrication system which lets you construct arbitrary objects (or parts for assembling more complex systems). It's unique in that you can construct one yourself for about $400us, and it is fully capable of making duplicates of itself.
A website of alternative energy and DIY home projects. Ever wanted to build your own windmill, generator, or CNC router? Check this site out.
How to make a woven watchband or bracelet out of parachute cord. Of course, in an emergency you can always unravel it and make use of the cord.
An /*duino/i shield which emulates an MOS 6581... the SID chip.
An open source DIY robotics/rapid prototyping kit much like an Erector set. Lots of standardized pre-milled bars, rods, connectors, and components. Build your own plotter, CNC machine, RepRap, scanner table, or what have you. Capable of three axes of linear motion. Comes with all the electronics you need, including an Arduino, stepper motors, and a motor driver board.
A blog dedicated to C'thul'hu mythos-related props and other crafts.
An open source object scanner that exports the data such that it can be replicated on a 3d printer.
Send them a graphic of some kind and they'll do custom fabric of it for you. No minimum order, they even sell test swatches.
A wiki of ways to fix things, including teardowns, where, to get parts, video tutorials, and diagnostic procedures.
The Shapeoko is an open source CNC that you can either buy as a kit or build yourself for about $300us. Work up your design on a laptop using open source CAD software, clamp feedstock on the bed, and it'll produce what you designed. Because it's open source it's not limited to wood - it could be adapted to just about any material that you can cut or grind could be. Chances are, someone's already done it and posted the docs.
Everything is also kept in a respository on Github: https://github.com/shapeoko/shapeoko
A website which lets you design circuitry online in your web browser (i.e., without having to (buy, download and install PCB engineering software). The online circuit designer contains a library of known, documented, and trusted subassemblies of circuits (like power supplies, amplifiers, and volume controls) that you can use as the framework of your circuit, but you have to add the rest. They plan on making it possible to automatically generate and e-mail all of the files a third party small-run manufacturer would need to etch, drill, and mail your circuit boards to you.
3694 links, including 185 private