This cheap DIY radio from Brown Dog Gadgets was an incredibly popular project on TreeHugger this year and it's easy to see why. It combines three things we talk about all the time: reusing materials for new projects, using renewable energy, and getting ready for anything. Plus, it's just fun to see a useful gadget you can cram in an Altoids tin.
However, we also give a hearty thumbs up to the Readers' Choice winner, the automated greenhouse. It is a fantastic way to get more people interested in growing (and keeping alive) their own herbs, fruits and veggies.