Load SnowRanger GPS trail maps onto your handheld Magellan or Garmin GPS, and you'll see where you are in relation to lifts, lodges and nearby runs. It even tells you a run's difficulty, so you won't accidentally find yourself in the middle of a double-black-diamond bump run (or on a Great Plainsâ€esque green). This year, the company adds maps to many East Coast resorts and more than 500 in Europe. [$20; snowranger.com]
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.