Make a 3D object into 2D slices
I'm thinking of an app that would take a 3D object and convert it into interlocking 2D slices (like SketchChair, but for all kinds of objects--I'm thinking specifically of those cardboard deer heads you can get from Urban Outfitters and other places). It would take a lot of the guesswork out of making complex forms!
Kirk Hausman commented
AutoDesk added a free tablet-based application that does this as part of their 123D series. That one also generates a build animation video and printable PDF plans for all pieces.
miguel fernandez commented
Autodesk just have developed your app. And ¡is free! is http://www.123dapp.com/make
You can already do this yourself with existing free software. You'll need Google SketchUp, a slice-form plug-in, and SVG Export plug-in. Try these links: